Annual report pursuant to Section 13 and 15(d)

Capital Stock Transactions - Additional Information (Detail)

v3.7.0.1
Capital Stock Transactions - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Jan. 31, 2017
Aug. 31, 2016
Jul. 30, 2016
Jun. 30, 2016
Apr. 30, 2016
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Sep. 30, 2016
Class Of Stock [Line Items]                  
Series A convertible preferred stock, shares authorized (in shares)           2,000,000 2,000,000    
Series A Convertible Preferred Stock, par value ($ per share)           $ 0.0001 $ 0.0001    
Series A convertible preferred stock, shares issued (in shares)           100,000 100,000    
Common stock issued upon exercise of options (in shares) 345   13,826 3,282 930        
Number of securities called by warrant (shares)       30,000          
Warrant exercise price ($ per share)       $ 1.08         $ 1.364
Restricted shares and warrants compensation for services rendered           $ 398,000 $ 867,000 $ 490,000  
Total unrecognized stock base compensation expense           $ 5,038,000 $ 9,377,000 $ 11,492,000  
Unvested stock options, weighted average period           2 years 2 months 12 days 2 years 7 months 6 days 2 years 4 months 24 days  
Warrant liability                  
Class Of Stock [Line Items]                  
Restricted shares and warrants compensation for services rendered           $ 0 $ 0    
Restricted Stock                  
Class Of Stock [Line Items]                  
Shares issued for service, vesting period           1 year      
Number of shares issued (in shares)           331,363      
Time Condition RSAs                  
Class Of Stock [Line Items]                  
Number of shares issued (in shares)   331,363       331,363 233,928 267,195  
Grant date fair value ($ per share)   $ 1.10              
Compensation expense           $ 0 $ 867,000 $ 956,000  
Non Vested Restricted Stock                  
Class Of Stock [Line Items]                  
Number of shares issued (in shares)           331,363 233,928    
Grant date fair value ($ per share)           $ 1.10 $ 1.47    
Cancelled (shares)           39,545 478,005    
Number of restricted shares, unvested (in shares)           139,318 110,046 642,343  
Total unrecognized stock base compensation expense           $ 103,000 $ 159,000    
Unvested stock options, weighted average period           4 months 4 months 2 days    
Minimum | Restricted Stock                  
Class Of Stock [Line Items]                  
Shares issued for service, vesting period           3 months      
Maximum | Restricted Stock                  
Class Of Stock [Line Items]                  
Shares issued for service, vesting period           2 years      
Convertible Preferred Stock                  
Class Of Stock [Line Items]                  
Series A convertible preferred stock, shares authorized (in shares)           2,000,000      
Series A Convertible Preferred Stock, par value ($ per share)           $ 0.0001      
Series A convertible preferred stock, shares issued (in shares)           100,000      
Convertible into (in shares)           20,000      
Liquidation preference, per shares ($ per share)           $ 10      
Initial Purchaser Of Warrants                  
Class Of Stock [Line Items]                  
Number of securities called by warrant (shares)                 250,000
Holder Of Notes                  
Class Of Stock [Line Items]                  
Number of securities called by warrant (shares)                 4,105,600