Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense Stock-Based Compensation Expense - Unvested Shares (Details)

v3.21.1
Stock-Based Compensation Expense Stock-Based Compensation Expense - Unvested Shares (Details) - $ / shares
 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Expired (in shares) (10,068)    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Expired, weighted average exercise price (in dollars per share) $ 14.73    
Unvested      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Options outstanding, beginning of period (in shares) 0 9,500 19,000
Granted (in shares) 0    
Vested (in shares) 0 (9,500) (9,500)
Forfeited (in shares) 0    
Options outstanding, end of period (in shares) 0 0 9,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Beginning balance, weighted average exercise price (in dollars per share) $ 0 $ 5.89 $ 5.89
Granted, weighted average exercise price (in dollars per share) 0    
Exercised, weighted average exercise price (in dollars per share)   5.89 5.89
Vested, weighted average exercise price (in dollars per share) 0    
Forfeited, weighted average exercise price (in dollars per share) 0    
Ending balance, weighted average exercise price (in dollars per share) $ 0 $ 0 $ 5.89
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]      
Options outstanding, beginning of period (in shares) 137,352 327,439 365,624
Granted (in shares) 71,780    
Exercised (in shares) (71,492) (185,792) (37,906)
Forfeited (in shares) (16,171) (4,295) (279)
Options outstanding, end of period (in shares) 111,401 137,352 327,439
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]      
Beginning balance, weighted average exercise price (in dollars per share) $ 12.25 $ 8.92 $ 9.09
Granted, weighted average exercise price (in dollars per share) 14.28    
Exercised, weighted average exercise price (in dollars per share) 6.81 6.24 10.44
Forfeited, weighted average exercise price (in dollars per share) 14.28 18.69 21.52
Ending balance, weighted average exercise price (in dollars per share) $ 16.53 $ 12.25 $ 8.92