Quarterly report pursuant to Section 13 or 15(d)

Description of Stock Plans (Details)

v3.10.0.1
Description of Stock Plans (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Weighted average grant-date fair value (in dollars per share) $ 1.68 $ 1.00  
Total unrecognized stock base compensation expense $ 2,747 $ 3,491  
Unvested stock options, weighted average period 2 years 3 months 21 days 2 years 24 days  
Allocated stock compensation expense $ 548 $ 791  
Maximum      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Option plan, term 10 years    
Equity Option      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Grants (shares) 1,198,425 326,500  
Forfeitures/cancellations (shares) 388,570    
Restricted Stock      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Awarded (in shares) 232,558    
Stock Option Plan 2011      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Reserved for future issuance (in shares) 20,000,000    
Available for issuance (in shares) 8,093,100   9,135,513
Stock Incentive Plans | Minimum      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Option plan, term 3 years    
Stock Incentive Plans | Maximum      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Option plan, term 4 years