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STOCK-BASED COMPENSATION - Stock option activity (Details) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021
Number Of Options |  |  |
Outstanding at the beginning of the period (in shares) | 667,500 | 679,750 |
Canceled (in shares) |  | (12,250) |
Outstanding at the end of the period (in shares) | 667,500 | 667,500 | 679,750
Vested or expected to vest at the end of the period (in shares) | 667,500 |  |
Exercisable and vested at the end of the period (in shares) | 667,500 |  |
Weighted Average Exercise Price |  |  |
Outstanding at the beginning of the period (in dollars per share) | $ 1.37 | $ 1.49 |
Outstanding at the end of the period (in dollars per share) | 1.37 | $ 1.37 | $ 1.49
Vested or expected to vest at the end of the period (in dollars per share) | 1.37 |  |
Exercisable and vested at the end of the period (in dollars per share) | $ 1.37 |  |
Aggregate Intrinsic Value |  |  |
Outstanding Value at the beginning of the period | $ 3,597,700 | $ 3,597,700 |
Outstanding Value at the end of the period | 3,804,625 | $ 3,597,700 | $ 3,597,700
Vested or expected to vest at the end of the period | 3,804,625 |  |
Exercisable and vested at the end of the period | $ 3,804,625 |  |
Weighted Average Remaining Contractual Life (in years) |  |  |
Outstanding at the end of the period | 3 years 8 months 12 days | 4 years 7 months 28 days | 5 years 7 months 13 days
Vested or expected to vest at the end of the period | 3 years 8 months 12 days |  |
Exercisable and vested at the end of the period | 3 years 8 months 12 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(03) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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