Annual report pursuant to Section 13 and 15(d)

Subsequent Events (unaudited) - Additional Information (Detail)

v3.8.0.1
Subsequent Events (unaudited) - Additional Information (Detail) - USD ($)
12 Months Ended
Mar. 06, 2018
Jan. 26, 2018
Jan. 25, 2018
Feb. 06, 2017
Feb. 26, 2016
Dec. 31, 2017
Dec. 31, 2016
Stock Options | Employees              
Subsequent Event [Line Items]              
Stock options granted       611,000      
Awards valued per share       $ 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.  
Restricted Stock Units (RSUs)              
Subsequent Event [Line Items]              
Awards valued per share       $ 1.55      
Granted       80,000   2,351,000 907,000
Restricted Stock Units (RSUs) | President And Chief Executive Officer              
Subsequent Event [Line Items]              
Awards valued per share       $ 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    
Subsequent Event | Stock Options | Employees              
Subsequent Event [Line Items]              
Stock options granted     1,800,000        
Awards valued per share     $ 0.42        
Options expiration period     10 years        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     36 months        
Share Based Compensation Arrangement By Share Based Payment Award, Vesting Commencement Date     Feb. 25, 2018        
Subsequent Event | Restricted Stock Units (RSUs) | President And Chief Executive Officer              
Subsequent Event [Line Items]              
Awards valued per share   $ 0.40          
Granted   200,000          
Subsequent Event | Western Alliance Warrant              
Subsequent Event [Line Items]              
Price per share of unregistered shares of common stock $ 0.47            
Warrant expiration date Mar. 06, 2028            
Subsequent Event | Maximum | Western Alliance Warrant              
Subsequent Event [Line Items]              
Number of warrants to purchase aggregate unregistered shares of common stock 120,000            
Business Financing Agreement | Subsequent Event              
Subsequent Event [Line Items]              
Borrowings relating to eligible accounts receivable $ 6,000,000            
Line of credit facility expiration date Mar. 06, 2020            
Line of credit facility, interest rate description Amounts outstanding under the Business Financing Agreement bear interest at a per annum floating rate equal to the greater of 4.5% or the “Prime Rate” published in the Money Rates section of the Western Edition of The Wall Street Journal (or such other rate of interest publicly announced from time to time by Western Alliance as its “Prime Rate”), plus 1.5% with respect to advances made under the line of credit, plus an additional 5.0% during any period that an event of default has occurred and is continuing.            
Business Financing Agreement | Domestic Revolving Credit Facility | Subsequent Event              
Subsequent Event [Line Items]              
Borrowings relating to eligible accounts receivable $ 6,000,000            
Maximum borrowing base percentage of eligible accounts receivable 75.00%            
Line of credit facility commitment fee percentage 0.25%            
Business Financing Agreement | Export Revolving Credit Facility | Subsequent Event              
Subsequent Event [Line Items]              
Borrowings relating to eligible accounts receivable $ 3,000,000            
Maximum borrowing base percentage of eligible accounts receivable 85.00%            
Line of credit facility commitment fee percentage 1.75%            
Business Financing Agreement | Line of Credit | Subsequent Event              
Subsequent Event [Line Items]              
Variable interest Rate with respect to advances made 1.50%            
Line of credit facility interest rate during period in event of default 5.00%            
Business Financing Agreement | Line of Credit | Subsequent Event | Minimum [Member]              
Subsequent Event [Line Items]              
Line of credit facility bearing floating interest rate per annum 4.50%