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STOCK PLANS AND STOCK-BASED COMPENSATION - Stock option activity (Details) - $ / shares	6 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Number of Shares
Balance, beginning of period	101,332	141,365
Options exercised	(58,000)	(28,533)
Expired	0	(2,500)
Balance, end of period	43,332	110,332
Weighted Average Exercise Price
Balance, beginning of period	$ 3.26	$ 3.77
Options exercised	3.69	5.30
Expired	0.00	8.12
Balance, end of period	$ 2.69	$ 3.27

X

- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

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

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- Definition

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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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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

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