Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Awards and Per Share Information - Additional Information (Detail)

v3.5.0.2
Stock-Based Awards and Per Share Information - Additional Information (Detail)
3 Months Ended 6 Months Ended
May 06, 2016
$ / shares
shares
Apr. 18, 2016
$ / shares
shares
Mar. 10, 2016
$ / shares
shares
Feb. 26, 2016
USD ($)
$ / shares
shares
Jun. 30, 2016
USD ($)
VicePresident
$ / shares
shares
Jun. 30, 2015
USD ($)
$ / shares
shares
Jun. 30, 2016
USD ($)
VicePresident
$ / shares
shares
Jun. 30, 2015
USD ($)
$ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Compensation cost related to stock options | $         $ 946,000 $ 935,000 $ 1,800,000 $ 1,600,000
Net impact of share based compensation expense to earnings per basic share | $ / shares         $ 0.02 $ 0.02 $ 0.03 $ 0.03
Net impact of share based compensation expense to earnings per diluted share | $ / shares         $ 0.02 $ 0.02 $ 0.03 $ 0.03
Total unrecognized compensation cost | $         $ 4,500,000   $ 4,500,000  
Unrecognized share based compensation cost to be recognized over weighted-average period         2 years 6 months      
Number of newly hired vice presidents | VicePresident         2   2  
Outstanding stock options and warrants excluded from diluted loss per share         15,572,000 16,251,000 15,572,000 16,251,000
Stock Options | Vice Presidents                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Stock options granted   325,000            
Awards issued per share | $ / shares   $ 1.43            
Options expiration period   10 years            
Stock Options | Non-Employee Directors                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Stock options granted 597,757              
Awards issued per share | $ / shares $ 1.41              
Options expiration period 10 years              
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 12 months              
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date Jun. 06, 2016              
Stock Options | Vest on January 2, 2016 | Vice Presidents                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Percentage on performance optional vesting   25.00%            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date   Apr. 18, 2017            
Stock Options | CFO Grant Award Tranche Two | Vice Presidents                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period   36 months            
Percentage on performance optional vesting   75.00%            
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date   Apr. 18, 2017            
Restricted Stock Units (RSUs)                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Granted             906,773  
Restricted Stock Units (RSUs) | President And Chief Executive Officer                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Awards issued per share | $ / shares       $ 0.86        
Granted       59,523        
Maximum performance bonus awarded | $       $ 100,000        
Restricted Stock Units (RSUs) | Vesting on March 30, 2016 | President And Chief Executive Officer                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Percentage on performance optional vesting       50.00%        
Restricted Stock Units (RSUs) | Vesting on February 18, 2017 | President And Chief Executive Officer                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Percentage on performance optional vesting       50.00%        
Restricted Stock Units (RSUs) | Vest on May 6, 2017 | Non-Employee Directors                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Awards issued per share | $ / shares $ 1.41              
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Date May 06, 2017              
Granted 248,750              
2002 Stock Incentive Plan                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Plan expiration date             May 05, 2019  
Common stock authorized for issuance under the 2002 Plan         15,550,000   15,550,000  
Common stock issued pursuant to options exercised             3,098,000  
Options and restricted stock units outstanding         6,201,000   6,201,000  
Options available for future grants         6,251,000   6,251,000  
Two Thousand Sixteen Compensation Plan | Stock Options | Employees and Consultants                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Stock options granted       295,000        
Awards issued per share | $ / shares       $ 0.86        
Options expiration period       10 years        
Two Thousand Sixteen Compensation Plan | Stock Options | Vest on January 2, 2016 | Existing Employees                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Stock options granted       185,000        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       48 months        
Two Thousand Sixteen Compensation Plan | Stock Options | CFO Grant Award Tranche Two | New Employees                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Stock options granted       110,000        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period       36 months        
Percentage on performance optional vesting       25.00%        
Two Thousand Sixteen Compensation Plan | Restricted Stock Units (RSUs) | Employees and Consultants                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Awards issued per share | $ / shares       $ 0.86        
Granted       140,000        
Two Thousand Sixteen Compensation Plan | Restricted Stock Units (RSUs) | Vest on January 2, 2016 | Employees and Consultants                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Percentage on performance optional vesting       25.00%        
Two Thousand Sixteen Compensation Plan | Restricted Stock Units (RSUs) | CFO Grant Award Tranche Two | Employees and Consultants                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Percentage on performance optional vesting       25.00%        
Two Thousand Sixteen Compensation Plan | Restricted Stock Units (RSUs) | CFO Grant Award Tranche Three | Employees and Consultants                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Percentage on performance optional vesting       25.00%        
Two Thousand Sixteen Compensation Plan | Restricted Stock Units (RSUs) | CFO Grant Award Tranche Four | Employees and Consultants                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Percentage on performance optional vesting       25.00%        
Two Thousand Fifteen Compensation Plan | Restricted Stock Units (RSUs) | Employees and Consultants                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Awards issued per share | $ / shares       $ 0.86        
Granted       388,500        
Two Thousand Fifteen Compensation Plan | Restricted Stock Units (RSUs) | Chief Financial Officer                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Awards issued per share | $ / shares     $ 1.23          
Granted     70,000