STOCK PLANS AND STOCK-BASED COMPENSATION - Stock option activity (Details) - $ / shares	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Number of Shares
Balance, beginning of period	14,310	17,332
Options exercised	(12,799)	(1,511)
Options expired	(1,511)
Balance, end of period	0	15,821
Weighted Average Exercise Price
Balance, beginning of period	$ 2.78	$ 2.78
Options exercised	2.78	2.78
Options expired	$ 2.78
Balance, end of period		$ 2.78