Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Expense - Stock Options Outstanding, Exercisable and Intrinsic Value (Details)

v3.23.1
Stock-Based Compensation Expense - Stock Options Outstanding, Exercisable and Intrinsic Value (Details) - Stock Options - USD ($)
 12 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Options outstanding (in shares) 74,366 89,237 111,401 163,016
Options outstanding, weighted average exercise price (in dollars per share) $ 16.33      
$14.28        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Options outstanding (in shares) 45,867      
Options outstanding, weighted average contractual life (in years) 7 years 2 months 12 days      
Options outstanding, weighted average exercise price (in dollars per share) $ 14.28      
Options outstanding, aggregate intrinsic value $ 393,810      
Options vested and exercisable, number exercisable (in shares) 0      
Options vested and exercisable, weighted average contractual life (in years) 7 years 2 months 12 days      
Options vested and exercisable, weighted average exercise price (in dollars per share) $ 0      
Options vested and exercisable, aggregate intrinsic value $ 0      
$19.64        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Options outstanding (in shares) 28,499      
Options outstanding, weighted average contractual life (in years) 3 years 9 months 18 days      
Options outstanding, weighted average exercise price (in dollars per share) $ 19.64      
Options outstanding, aggregate intrinsic value $ 244,690      
Options vested and exercisable, number exercisable (in shares) 28,499      
Options vested and exercisable, weighted average contractual life (in years) 3 years 9 months 18 days      
Options vested and exercisable, weighted average exercise price (in dollars per share) $ 19.64      
Options vested and exercisable, aggregate intrinsic value $ 0      
$14.28 - $21.52        
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]        
Options outstanding (in shares) 74,366      
Options outstanding, weighted average contractual life (in years) 5 years 10 months 24 days      
Options outstanding, aggregate intrinsic value $ 638,500      
Options vested and exercisable, number exercisable (in shares) 28,499      
Options vested and exercisable, weighted average contractual life (in years) 5 years 10 months 24 days      
Options vested and exercisable, weighted average exercise price (in dollars per share) $ 19.64      
Options vested and exercisable, aggregate intrinsic value $ 0