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STOCK PLANS AND STOCK-BASED COMPENSATION - Stock option activity (Details) - $ / shares | 3 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019
Number of Shares |  |
Balance, beginning of year | 43,332 | 101,332
Options exercised | (5,000) | (15,000)
Balance, end of year | 38,332 | 86,332
Weighted Average Exercise Price |  |
Balance, beginning of year | $ 2.69 | $ 3.26
Options exercised | 1.97 | 3.27
Balance, end of year | $ 2.78 | $ 3.26

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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=116856206&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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