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STOCK PLANS AND STOCK-BASED COMPENSATION - Stock option activity (Details) - $ / shares | 6 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Number of Shares |  |
Balance, beginning of year | 23,332 | 43,332
Options exercised | (6,000) | (5,000)
Balance, end of year | 17,332 | 38,332
Weighted Average Exercise Price |  |
Balance, beginning of year | $ 2.78 | $ 2.69
Options exercised | 2.78 | 1.97
Balance, end of year | $ 2.78 | $ 2.78

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- Definition Number of options outstanding, including both vested and non-vested options. + 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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + 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 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
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