Annual report pursuant to Section 13 and 15(d)

Capital Stock Transactions - Additional Information (Detail)

v3.5.0.1
Capital Stock Transactions - Additional Information (Detail) - USD ($)
1 Months Ended 12 Months Ended
Oct. 02, 2015
Jul. 03, 2013
Dec. 28, 2011
Dec. 28, 2011
Feb. 29, 2016
Jan. 31, 2016
Nov. 30, 2015
Oct. 31, 2015
Sep. 30, 2015
Jul. 31, 2015
Jun. 30, 2015
May 31, 2015
Apr. 30, 2015
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Class Of Stock [Line Items]                                
Series A convertible preferred stock, shares authorized (in shares)                           2,000,000 2,000,000  
Series A Convertible Preferred Stock, par value ($ per share)                           $ 0.0001 $ 0.0001  
Series A convertible preferred stock, shares issued (in shares)                           100,000 100,000  
Stock issued for warrants exercised (in shares)                         452,974      
Warrants exercised (in shares)                         666,667      
Common stock issued upon exercise of options (in shares)             2,248 1,227 19,425 40,116 333 3,333        
Shares canceled (in shares)           23,841       10,874            
Stock issued for settlement of liability (in shares)                   117,000            
Issuance of common stock as part of public offering, less costs               $ 8,740,000           $ 12,627,000   $ 30,597,000
Public offering $ 12,627,000                              
Number of common stock shares cancelled (in shares)                           454,164 8,131  
Expense                           $ 867,000 $ 490,000 $ 1,351,000
Total unrecognized stock base compensation expense                           $ 9,377,000 $ 11,492,000  
Unvested stock options, weighted average period                           2 years 6 months 29 days 2 years 4 months 13 days  
Performance and Market Condition RSAs                                
Class Of Stock [Line Items]                                
Number of shares issued (in shares)       3,170,000                        
Number of restricted shares, vested (in shares)                             594,372  
Number of restricted shares, unvested (in shares)                             454,164  
Expense                             $ 1,967,000  
Time Condition RSAs                                
Class Of Stock [Line Items]                                
Number of shares issued (in shares)           23,200 210,728             233,928 267,195  
Grant date fair value ($ per share)           $ 1.06 $ 1.51                  
Compensation expense                           $ 867,000 $ 956,000  
Non Vested Restricted Stock                                
Class Of Stock [Line Items]                                
Number of shares issued (in shares)                           233,928 267,195  
Number of restricted shares, vested (in shares)                           288,220 981,731  
Number of restricted shares, unvested (in shares)                           110,046 642,343 1,365,010
Grant date fair value ($ per share)                           $ 1.47 $ 3.60  
Total unrecognized stock base compensation expense                           $ 159,000 $ 876,000  
Unvested stock options, weighted average period                           4 months 2 days 2 months 19 days  
Share-based Compensation Award, Tranche One | Performance and Market Condition RSAs                                
Class Of Stock [Line Items]                                
Vesting percentage     33.33%                          
Share-based Compensation Award, Tranche Two | Performance and Market Condition RSAs                                
Class Of Stock [Line Items]                                
Vesting percentage   33.33%                            
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    
Directors                                
Class Of Stock [Line Items]                                
Number of common stock issued for service (in shares)         23,200   210,728                  
Shares issued for service, vesting period             1 year                  
Value of common stock issued for service         $ 25,000   $ 318,000                  
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