Stockholders' Equity - Additional Information (Detail)

v3.8.0.1

Stockholders' Equity - Additional Information (Detail)																													9 Months Ended	12 Months Ended
	Dec. 05, 2017 USD ($) shares	Nov. 07, 2017 $ / shares shares	Nov. 01, 2017 $ / shares shares	Oct. 02, 2017 $ / shares shares	Sep. 12, 2017 $ / shares shares	Sep. 11, 2017 $ / shares shares	May 10, 2017 $ / shares shares	May 09, 2017 $ / shares shares	Apr. 19, 2017 VicePresident $ / shares shares	Apr. 18, 2017 USD ($) $ / shares shares	Mar. 27, 2017 SeniorVicePresidentChiefFinancialOfficer $ / shares shares	Feb. 06, 2017 $ / shares shares	Dec. 31, 2016 shares	Dec. 30, 2016 shares	Dec. 29, 2016	Oct. 03, 2016 $ / shares shares	Sep. 15, 2016 $ / shares shares	Aug. 29, 2016 $ / shares shares	Aug. 08, 2016 USD ($) $ / shares shares	May 06, 2016 $ / shares shares	Apr. 18, 2016 VicePresident $ / shares shares	Mar. 10, 2016 $ / shares shares	Feb. 26, 2016 $ / shares shares	Jan. 02, 2016 shares	Aug. 12, 2015 USD ($)	Jul. 13, 2015 $ / shares shares	Mar. 09, 2015 $ / shares shares	Jan. 02, 2015 $ / shares shares	Sep. 30, 2016 USD ($)	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) shares	Jun. 23, 2015 shares	Dec. 31, 2014 shares
Stockholders Equity [Line Items]
Preferred stock, shares authorized													1,000,000																	1,000,000	1,000,000
Preferred stock, shares issued													0																	0	0
Preferred stock, shares outstanding													0																	0	0
Common stock, shares issued													67,566,000																	102,339,682	67,566,000
Common stock, shares outstanding													67,566,000																	102,339,682	67,566,000
Common stock, shares authorized													100,000,000																	200,000,000	100,000,000
Proceeds from equity offering, net of expenses | $	$ 11,400,000									$ 10,200,000									$ 9,500,000											$ 21,761,000	$ 9,520,000
Dividend Declared | $																														$ 0	0	$ 0
Number of newly hired vice presidents | VicePresident									1												2
Number of senior vice president and chief financial officer | SeniorVicePresidentChiefFinancialOfficer											1
Chief Financial Officer
Stockholders Equity [Line Items]
Additional compensation expense | $																															$ 215,000
Share based compensation arrangement by share based payment award modification occurred to vest unvested options														294,205
Options exercise period														1 year	90 days
Share based compensation arrangement by share based payment award vested stock options														623,026
Chief Financial Officer | Vest on First Anniversary of Award Date
Stockholders Equity [Line Items]
Stock options granted																											523,026
Option shares vested and exercised																											130,757
Shares vested and exercisable date																											Mar. 09, 2016
Shares vested and exercised consecutive term																											35 months
Share based compensation arrangement by share Based payment award fair value price | $ / shares																											$ 1.48
Expected term (years)																											6 years 1 month 6 days
Volatility																											88.79%
Risk-free interest rate																											1.83%
Chief Financial Officer | Vest on Second Anniversary of Award Date
Stockholders Equity [Line Items]
Stock options granted																											348,684
Shares vested and exercisable date																											Mar. 09, 2025
Share based compensation arrangement by share Based payment award fair value price | $ / shares																											$ 1.70
Expected term (years)																											10 years
Volatility																											87.87%
Risk-free interest rate																											2.19%
Option shares vested and exercised													100,000
Chief Executive Officer
Stockholders Equity [Line Items]
Shares vested and exercised consecutive term																										36 months
Stock Options | Employees
Stockholders Equity [Line Items]
Stock options granted												611,000
Awards valued per share | $ / shares												$ 1.55
Options expiration period												10 years
Options vesting description																														Vesting periods for options is ratably over the 36-month period, commencing on February 25, 2018.
Stock Options | Existing Employees
Stockholders Equity [Line Items]
Stock options granted												586,000
Stock Options | Existing Employees | Vest on First Anniversary of Award Date
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage												50.00%
Stock Options | Existing Employees | Vest on Second Anniversary of Award Date
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage												50.00%
Stock Options | New Employees
Stockholders Equity [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date												Mar. 06, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period												36 months
Options vesting description																														for the 25,000 options awarded to new employees, 25% vest on February 6, 2018 and the remainder vest ratably over the 36-month period, commencing on March 6, 2018
Stock Options | New Employees | Vest on February 6, 2018
Stockholders Equity [Line Items]
Stock options granted												25,000
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date												Feb. 06, 2018
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage												25.00%
Stock Options | Mr. Clark
Stockholders Equity [Line Items]
Additional compensation expense | $																														$ 44,000
Stock Options | Mr. Moll
Stockholders Equity [Line Items]
Additional compensation expense | $																														$ 22,000
Stock Options | Vice Presidents
Stockholders Equity [Line Items]
Stock options granted									400,000
Awards valued per share | $ / shares									$ 1.17
Options expiration period									10 years
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date									Mar. 13, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period									36 months
Percentage of time based vesting for options									75.00%
Stock Options | Vice Presidents | Awards Vesting on March 13, 2018
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage									25.00%
Non Qualified Stock Options
Stockholders Equity [Line Items]
Exercise Price of Stock Options | $ / shares																												$ 2.64
Non Qualified Stock Options | Employees
Stockholders Equity [Line Items]
Stock options granted		426,000
Awards valued per share | $ / shares		$ 0.60
Options expiration period		10 years
Non Qualified Stock Options | Employees | Vest on First Anniversary of Award Date
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage		50.00%
Non Qualified Stock Options | Employees | Vest Commencing on Thirteen Month to Twenty-Four Month
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage		50.00%
Non Qualified Stock Options | Existing Employees
Stockholders Equity [Line Items]
Stock options granted																							185,000
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period																							48 months
Non Qualified Stock Options | New Employees
Stockholders Equity [Line Items]
Stock options granted																							110,000
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period																							36 months
Non Qualified Stock Options | New Employees | Vest on First Anniversary of Award Date
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																							25.00%
Non Qualified Stock Options | Non-Employee Directors
Stockholders Equity [Line Items]
Stock options granted							525,528													597,757
Awards valued per share | $ / shares							$ 1.21													$ 1.41
Options expiration period							10 years													10 years
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date							Jun. 10, 2017													Jun. 06, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period							12 months													12 months
Non Qualified Stock Options | Dr. Lord
Stockholders Equity [Line Items]
Stock options granted					65,891	65,385
Awards valued per share | $ / shares					$ 0.61	$ 0.54
Options expiration period					10 years	10 years
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date					Oct. 10, 2017	Oct. 10, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period					8 months	8 months
Non Qualified Stock Options | Dr. Lanman
Stockholders Equity [Line Items]
Stock options granted			135,333,000
Awards valued per share | $ / shares			$ 0.75
Options expiration period			10 years
Non Qualified Stock Options | Employees and Consultants
Stockholders Equity [Line Items]
Stock options granted																							295,000
Awards valued per share | $ / shares																							$ 0.86
Options expiration period																							10 years
Non Qualified Stock Options | Vice Presidents
Stockholders Equity [Line Items]
Stock options granted																125,000	250,000				325,000
Awards valued per share | $ / shares																$ 1.72	$ 1.78				$ 1.43
Options expiration period																10 years	10 years				10 years
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date																Oct. 03, 2017	Sep. 15, 2017				Apr. 18, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period																	36 months				36 months
Percentage of time based vesting for options																	75.00%				75.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date																	Sep. 15, 2017
Percentage of performance based vesting in options granted																50.00%
Non Qualified Stock Options | Vice Presidents | Awards Vesting on April 18, 2017
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																					25.00%
Non Qualified Stock Options | Vice Presidents | Awards Vesting on September 15, 2017
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																	25.00%
Non Qualified Stock Options | Vice Presidents | Awards Vesting on October 3, 2017
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																25.00%
Non Qualified Stock Options | Vice Presidents | Time Based Vesting Commencing October 3, 2017
Stockholders Equity [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date																Oct. 03, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period																36 months
Percentage of time based vesting for options																75.00%
Non Qualified Stock Options | Senior Director
Stockholders Equity [Line Items]
Stock options granted																		60,000
Awards valued per share | $ / shares																		$ 1.65
Options expiration period																		10 years
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date																		Sep. 29, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period																		48 months
Non Qualified Stock Options | Senior Director | Awards Vesting on September 29, 2016
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																		50.00%
Non Qualified Stock Options | President And Chief Executive Officer
Stockholders Equity [Line Items]
Stock options granted																															1,400,000
Options expiration period																														10 years
Range of exercise price, lower limit | $ / shares																															$ 1.44
Range of exercise price, upper limit | $ / shares																															$ 1.45
Non Qualified Stock Options | Officers
Stockholders Equity [Line Items]
Stock options granted																												1,365,702
Options expiration period																												10 years
Options vesting description																															(i) as to 50% of the options, one-fourth on the one year anniversary of the grant date and the remaining three-fourths, ratably over the next 36 month period, commencing on the thirteenth month from grant date over a requisite service period of four years, and (ii) as to 50% of the options, upon achievement of specific annual Company performance criteria with a requisite service period of one year.
Non Qualified Stock Options | Consultants
Stockholders Equity [Line Items]
Stock options granted																												86,000
Options expiration period																												5 years
Non Qualified Stock Options | Officers And Consultant
Stockholders Equity [Line Items]
Additional compensation expense | $																																$ 154,000
Decrease in fair value awards | $																									$ 661,000
Non Qualified Stock Options | Chief Financial Officer
Stockholders Equity [Line Items]
Stock options granted																											871,710
Options expiration period																											10 years
Stock options granted at an exercise price | $ / shares																											$ 1.99
Non Qualified Stock Options | Senior Vice President and Chief Financial Officer
Stockholders Equity [Line Items]
Stock options granted				600,000							600,000
Awards valued per share | $ / shares				$ 0.59							$ 1.28
Options expiration period				10 years							10 years
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date				Oct. 02, 2018							Mar. 27, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period				36 months							36 months
Percentage of time based vesting for options				75.00%							75.00%
Non Qualified Stock Options | Senior Vice President and Chief Financial Officer | Awards Vesting on March 27, 2018
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage											25.00%
Non Qualified Stock Options | Senior Vice President and Chief Financial Officer | Awards Vesting on October 2, 2018
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage				25.00%
Non Qualified Stock Options | Chief Executive Officer
Stockholders Equity [Line Items]
Stock options granted																										870,000
Options expiration period																										10 years
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period																										4 years
Stock options outstanding													435,000																		435,000
Exercise Price of Stock Options | $ / shares																										$ 1.64
Stock options granted at an exercise price | $ / shares																										$ 1.64
Restricted Stock Units (RSUs)
Stockholders Equity [Line Items]
Awards valued per share | $ / shares												$ 1.55
Granted												80,000																		2,351,000	907,000
Vested in period																														404,000	488,000	37,000
Restricted Stock Units (RSUs) | Vested on March 14, 2017
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date												Mar. 14, 2017
Vested in period												30,000
Restricted Stock Units (RSUs) | Vested on September 14, 2017
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date												Sep. 14, 2017
Vested in period												20,000
Restricted Stock Units (RSUs) | Vest on May 10, 2018
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date												May 10, 2018
Vested in period												30,000
Restricted Stock Units (RSUs) | Non-Employee Directors
Stockholders Equity [Line Items]
Stock options granted							175,176
Awards valued per share | $ / shares							$ 1.21
Restricted Stock Units (RSUs) | Non-Employee Directors | Vest on May 10, 2018
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date							May 10, 2018
Restricted Stock Units (RSUs) | Non-Employee Directors | Vest on May 6, 2017
Stockholders Equity [Line Items]
Awards valued per share | $ / shares																				$ 1.41
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date																				May 06, 2017
Granted																				248,750
Restricted Stock Units (RSUs) | Mr. Clark
Stockholders Equity [Line Items]
Additional compensation expense | $																														$ 12,000
Restricted Stock Units (RSUs) | Mr. Moll
Stockholders Equity [Line Items]
Additional compensation expense | $																														$ 10,000
Restricted Stock Units (RSUs) | Employees and Consultants
Stockholders Equity [Line Items]
Awards valued per share | $ / shares																							$ 0.86
Granted																							140,000
Restricted Stock Units (RSUs) | Employees and Consultants | Vest on First Anniversary of Award Date
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																							25.00%
Restricted Stock Units (RSUs) | Employees and Consultants | Vest on July 1, 2016
Stockholders Equity [Line Items]
Awards valued per share | $ / shares																							$ 0.86
Granted																							388,500
Restricted Stock Units (RSUs) | Employees and Consultants | Vest on February 26, 2018
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																							25.00%
Restricted Stock Units (RSUs) | Employees and Consultants | Vest on February 26, 2019
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																							25.00%
Restricted Stock Units (RSUs) | Employees and Consultants | Vest on February 26, 2020
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																							25.00%
Restricted Stock Units (RSUs) | President And Chief Executive Officer
Stockholders Equity [Line Items]
Awards valued per share | $ / shares												$ 1.55											$ 0.86
Options vesting description																														(i) one-quarter of the RSUs vest on February 6, 2019, (ii) one-eighth of the RSUs vest on February 6, 2020, (iii) one-eighth of the RSUs vest on February 6, 2021, and (iv) one-half of the RSUs vest upon the achievement of specific interim and annual Company performance criteria.
Granted												1,000,000											59,523
Maximum performance bonus awarded | $																													$ 100,000
Restricted Stock Units (RSUs) | President And Chief Executive Officer | Vest on February 6, 2019
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date												Feb. 06, 2019
Restricted Stock Units (RSUs) | President And Chief Executive Officer | Vest on February 6, 2020
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date												Feb. 06, 2020
Restricted Stock Units (RSUs) | President And Chief Executive Officer | Vest on February 6, 2021
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date												Feb. 06, 2021
Restricted Stock Units (RSUs) | President And Chief Executive Officer | Vesting on March 30, 2016
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																							50.00%
Restricted Stock Units (RSUs) | President And Chief Executive Officer | Vesting on February 18, 2017
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																							50.00%
Options Vesting And Becoming Exercisable Each Month | Chief Financial Officer | Vest on First Anniversary of Award Date
Stockholders Equity [Line Items]
Option shares vested and exercised																											10,896
Options Vesting And Becoming Exercisable Each Month | Chief Executive Officer
Stockholders Equity [Line Items]
Option shares vested and exercised																										18,125
Thirty Six Month Anniversary | Chief Financial Officer | Vest on First Anniversary of Award Date
Stockholders Equity [Line Items]
Option shares vested and exercised																											10,909
Shares vested and exercisable date																											Mar. 09, 2019
Ten Year Anniversary | Chief Financial Officer | Vest on Second Anniversary of Award Date
Stockholders Equity [Line Items]
Option shares vested and exercised																																	100,000
One Year Anniversary | Chief Executive Officer
Stockholders Equity [Line Items]
Option shares vested and exercised																										217,500
2002 Stock Incentive Plan
Stockholders Equity [Line Items]
Plan expiration date																														May 05, 2019
Common stock authorized for issuance under the 2002 Plan																														15,550,000
Common stock issued pursuant to options exercised																														3,963,696
Options outstanding																														8,526,388
Options available for future grants																														3,059,916
Stock options outstanding													6,612,000																	6,737,000	6,612,000	4,493,000		3,475,000
Expected term (years)																														5 years 6 months 3 days	5 years 11 months 15 days	5 years 9 months 18 days
Volatility																														79.00%	86.00%	90.00%
Risk-free interest rate																														1.99%	1.39%	1.64%
2002 Stock Incentive Plan | Non Qualified Stock Options | Officers And Consultant
Stockholders Equity [Line Items]
Options available for future grants																																122,038
Stock options granted																								488,170
April 18, 2016 Compensation Plan | Non Qualified Stock Options | Vice Presidents
Stockholders Equity [Line Items]
Stock options outstanding													243,750																		243,750
August 29, 2016 Compensation Plan | Non Qualified Stock Options | Senior Director
Stockholders Equity [Line Items]
Stock options outstanding													60,000																		60,000
September 15, 2016 Compensation Plan | Non Qualified Stock Options | Vice Presidents
Stockholders Equity [Line Items]
Stock options outstanding													250,000																		250,000
October 3, 2016 Compensation Plan | Non Qualified Stock Options | Vice Presidents
Stockholders Equity [Line Items]
Stock options outstanding													125,000																		125,000
Two Thousand Fifteen Compensation Plan | Non Qualified Stock Options | Officers And Consultant | Vest on First Anniversary of Award Date
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage																								80.00%
Two Thousand Fifteen Compensation Plan | Restricted Stock Units (RSUs) | Chief Financial Officer
Stockholders Equity [Line Items]
Awards valued per share | $ / shares																						$ 1.23
Granted																						70,000
2017 Compensation Plan | Restricted Stock Units (RSUs) | Employees and Consultants
Stockholders Equity [Line Items]
Stock options granted								500,000
Awards valued per share | $ / shares								$ 1.22
Options vesting description																														(i) one-half of the total grant is subject to time vesting with 50% vesting on May 9, 2018 and the remaining 50% vesting on May 9, 2019, and (ii) one-half of the total grant is subject to specific 2017 and 2018 performance criteria, with vesting upon satisfaction of the applicable performance criteria.
Percentage of time based vesting for options								50.00%
2017 Compensation Plan | Restricted Stock Units (RSUs) | Employees and Consultants | Vesting on May 9, 2018
Stockholders Equity [Line Items]
Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage								50.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date								May 09, 2018
2017 Compensation Plan | Restricted Stock Units (RSUs) | Employees and Consultants | Vesting on May 9, 2019
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date								May 09, 2019
Rights Offering | Common Stock
Stockholders Equity [Line Items]
Shares of common stock sold	26,302,703
Proceeds from equity offering, gross | $	$ 12,000,000
Payments of stock issuance costs | $	600,000
Proceeds from equity offering, net of expenses | $	$ 11,400,000
Rights Offering | Common Stock | Affiliates of Larry Feinberg
Stockholders Equity [Line Items]
Shares of common stock sold	10,745,614
Rights Offering | Common Stock | Affiliates of Jack Schuler
Stockholders Equity [Line Items]
Shares of common stock sold	10,964,912
2017 Private Placement
Stockholders Equity [Line Items]
Proceeds from equity offering, gross | $										10,500,000
Payments of stock issuance costs | $										300,000
Proceeds from equity offering, net of expenses | $										10,200,000
2017 Private Placement | 2017 Warrants
Stockholders Equity [Line Items]
Proceeds from equity offering, gross | $										$ 2,300,000
Number of warrants to purchase aggregate unregistered shares of common stock										3,925,871
Price per share of unregistered shares of common stock | $ / shares										$ 1.80
2016 Private Placement
Stockholders Equity [Line Items]
Proceeds from equity offering, gross | $																			10,000,000
Payments of stock issuance costs | $																			500,000
Proceeds from equity offering, net of expenses | $																			9,500,000
2016 Private Placement | 2016 Warrants
Stockholders Equity [Line Items]
Proceeds from equity offering, gross | $																			$ 1,100,000
Number of warrants to purchase aggregate unregistered shares of common stock																			2,035,398
Price per share of unregistered shares of common stock | $ / shares																			$ 2.00
Maximum
Stockholders Equity [Line Items]
Preferred stock, shares authorized																														1,000,000
Maximum | Non Qualified Stock Options | Employees
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period		24 months
Maximum | Non Qualified Stock Options | President And Chief Executive Officer
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period																														4 years
Minimum | Non Qualified Stock Options | Employees
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period		13 months
Minimum | Non Qualified Stock Options | President And Chief Executive Officer
Stockholders Equity [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Monthly Ratable Award Vesting Period																														2 years
Series B Junior Participating Preferred Stock [Member]
Stockholders Equity [Line Items]
Preferred stock, shares authorized																														500,000