Quarterly report pursuant to Section 13 or 15(d)

Capital Stock Transactions - Additional Information (Detail)

v3.7.0.1
Capital Stock Transactions - Additional Information (Detail) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Mar. 31, 2017
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
Total unrecognized stock base compensation expense $ 3,491 $ 8,103  
Unvested stock options, weighted average period 2 years 25 days 2 years 5 months 15 days  
Time Condition RSAs      
Class Of Stock [Line Items]      
Compensation expense $ 76 $ 80  
Non Vested Restricted Stock      
Class Of Stock [Line Items]      
Total unrecognized stock base compensation expense $ 27    
Unvested stock options, weighted average period 1 month    
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
Series A Convertible Preferred Stock, par value (in usd per share)     $ 0.0001
Series A convertible preferred stock issued (in shares)     100,000
Aggregate shares upon conversion (shares) 20,000    
Liquidation preference ($ per share)     $ 10