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STOCK PLANS AND STOCK-BASED COMPENSATION - Stock option activity (Details) - $ / shares	3 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Number of Shares
Balance, beginning of year	17,332	23,332
Options exercised	(1,511)
Balance, end of year	15,821	23,332
Weighted Average Exercise Price
Balance, beginning of year	$ 2.78	$ 2.78
Options exercised	2.78
Balance, end of year	$ 2.78	$ 2.78

X

- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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-Subparagraph (c)(1)(ii)
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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Number of share options (or share units) exercised during the current period.

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