Quarterly report pursuant to Section 13 or 15(d)

Capital Stock Transactions - Additional Information (Detail)

v3.6.0.2
Capital Stock Transactions - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 9 Months Ended
Aug. 31, 2016
Jul. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Sep. 28, 2016
Jun. 09, 2016
Mar. 31, 2016
Class Of Stock [Line Items]                  
Series A convertible preferred stock authorized (in shares)     2,000,000   2,000,000       2,000,000
Series A Convertible Preferred Stock, par value (in usd per share)     $ 0.0001   $ 0.0001       $ 0.0001
Series A convertible preferred stock issued (in shares)     100,000   100,000       100,000
Warrants issued (shares)               30,000  
Warrant exercise price (in usd per share)             $ 1.364 $ 1.08  
Common stock issued upon exercise of options (in shares)   13,826              
Warrant expense         $ 276 $ 723      
Fair value $ 364                
Total unrecognized stock base compensation expense     $ 5,706 $ 11,492 $ 5,706 $ 11,492      
Unvested stock options, weighted average period         2 years 3 months 8 days 2 years 9 months 7 days      
Warrant liability                  
Class Of Stock [Line Items]                  
Warrant expense     0   $ 19        
Restricted Stock                  
Class Of Stock [Line Items]                  
Vesting period         1 year        
Awarded (in shares) 331,363       331,363        
Time Condition RSAs                  
Class Of Stock [Line Items]                  
Compensation expense     92 $ 123 $ 258 $ 723      
Non Vested Restricted Stock                  
Class Of Stock [Line Items]                  
Awarded (in shares)         331,363        
Total unrecognized stock base compensation expense     $ 212   $ 212        
Unvested stock options, weighted average period         6 months 29 days        
Minimum | Restricted Stock                  
Class Of Stock [Line Items]                  
Vesting period         3 months        
Maximum | Restricted Stock                  
Class Of Stock [Line Items]                  
Vesting period         2 years        
Convertible Preferred Stock                  
Class Of Stock [Line Items]                  
Series A convertible preferred stock authorized (in shares)     2,000,000   2,000,000        
Series A Convertible Preferred Stock, par value (in usd per share)     $ 0.0001   $ 0.0001        
Series A convertible preferred stock issued (in shares)     100,000   100,000        
Aggregate shares upon conversion (shares)         20,000        
Liquidation preference ($ per share)     $ 10   $ 10        
Initial Purchaser Of Warrants                  
Class Of Stock [Line Items]                  
Warrants issued (shares)             250,000    
Holder Of Notes                  
Class Of Stock [Line Items]                  
Warrants issued (shares)             4,105,600