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Stock-Based Compensation - Restricted Stock Units (Details) - Restricted stock units
6 Months Ended
Sep. 30, 2021
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of shares of common stock receivable upon vesting of each RSU (in shares) 1
Number of Shares  
Options outstanding at the beginning of the period (in shares) 448,000
Granted (in shares) 73,000
Vested (in shares) (142,000)
Forfeited (in shares) 0
Options outstanding at the end of the period (in shares) 379,000
Weighted Average Price Per Share  
Options outstanding at the beginning of the period (in dollars per share) | $ / shares $ 4.08
Granted (in dollar per share) | $ / shares 5.51
Vested (in dollars per share) | $ / shares 4.83
Forfeited (in dollars per share) | $ / shares 0
Options outstanding at the end of the period (in dollars per share) | $ / shares $ 4.07