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STOCK-BASED COMPENSATION - Stock option activity (Details) - USD ($) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Mar. 31, 2023
Number Of Options |  |
Outstanding at the beginning of the period (in shares) | 667,500 |
Exercised (in shares) | (125,000) |
Vested or expected to vest at the end of the period (in shares) | 542,500 |
Exercisable and vested at the end of the period (in shares) | 542,500 |
Outstanding at the end of the period (in shares) | 542,500 | 667,500
Weighted Average Exercise Price |  |
Outstanding at the beginning of the period (in dollars per share) | $ 1.37 |
Exercised (in dollars per share) | 0.68 |
Outstanding at the end of the period (in dollars per share) | 1.53 | $ 1.37
Vested or expected to vest at the end of the period (in dollars per share) | 1.53 |
Exercisable and vested at the end of the period (in dollars per share) | $ 1.53 |
Aggregate Intrinsic Value |  |
Outstanding Value at the beginning of the period | $ 3,804,625 |
Exercised | 846,250 |
Vested or expected to vest at the end of the period | 3,108,950 |
Exercisable and vested at the end of the period | 3,108,950 |
Outstanding Value at the end of the period | $ 3,108,950 | $ 3,804,625
Weighted Average Remaining Contractual Life (in years) |  |
Outstanding at the end of the period | 3 years 7 months 17 days | 3 years 8 months 12 days
Vested or expected to vest at the end of the period | 3 years 7 months 17 days |
Exercisable and vested at the end of the period | 3 years 7 months 17 days |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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