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STOCK BASED COMPENSATION PLANS - Narrative (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended
--- | --- | --- | ---
Jul. 18, 2021 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |
Share-based compensation expense |  | $ 1,236,000 | $ 1,060,000 | $ 2,199,000 | $ 1,881,000
Restricted Stock |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |
Weighted-average vesting period |  |  |  | 2 years 9 months 18 days |
Share-based compensation expense |  | 1,200,000 | 1,100,000 | $ 2,200,000 | 1,900,000
Non-vested restricted stock awards |  | $ 10,600,000 |  | $ 10,600,000 |
Restricted Stock | 2010 Plan |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  |  | 4 years |
Right to grant period | 10 years |  |  |  |
Restricted Stock | 2021 Employee Plan |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |
Available for issuance (in shares) | 1,200,000 |  |  |  |
Remaining number of shares authorized (in shares) |  | 722,267 |  | 722,267 |
Restricted Stock | Non-Employee Director Plan |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  |  | 1 year |
Available for issuance (in shares) |  | 120,000 |  | 120,000 |
Remaining number of shares authorized (in shares) |  | 96,695 |  | 96,695 |
Term of service |  |  |  | 1 year |
Grant market value |  | $ 50,000 |  | $ 50,000 |
Weighted-average vesting period |  |  |  | 1 year |
Share-based compensation expense |  | $ 100,000 | $ 35,500 | $ 100,000 | $ 35,500

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