Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Employee Stock Options Narrative (Details)

v3.19.1
Stock-Based Compensation - Employee Stock Options Narrative (Details) - Stock Options - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized for grant 12,200    
Expiration period 10 years    
Options (in thousands)      
Options outstanding, beginning balance (in shares) 230    
Options exercised (in shares) 74    
Options expired (in shares) 1    
Options outstanding, ending balance (in shares) 155 230  
Options exercisable (in shares) 155    
Weighted- Average Exercise Price      
Options outstanding weighted average exercise price (in dollars per share) $ 6.37 $ 6.36  
Options exercised weighted average exercise price (in dollars per share) 6.42    
Options expired weighted average exercise price (in dollars per share) 1.92    
Options exercisable weighted average exercise price (in dollars per share) $ 6.37    
Remaining weighted average contractual life of options exercisable (years) 2 years 10 months 1 day    
Remaining weighted average contractual life of options outstanding (years) 2 years 10 months 1 day    
Weighted average grant-date fair value of non-vested shares (in dollars per share) $ 0.00 0.00 $ 2.72
Weighted average grant-date fair value of shares      
Forfeited (in dollars per share) 0.00 0.00 0.00
Vested (in dollars per share) 0.00 0.00 2.72
Granted (in dollars per share) $ 0.00 $ 0.00 $ 2.72
Total estimated fair value of shares vested $ 0 $ 0 $ 223
Stock options exercised 1,296 6,914 $ 890
Options outstanding 1,644 2,713  
Options currently exercisable 1,644 $ 2,713  
Total unrecognized compensation cost, non-vested options $ 0    
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
2011 Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized for grant 11,400    
Prior Plans      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized for grant 800