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6. INCOME TAXES - Statutory income tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
INCOME TAXES
U.S. Federal taxes at statutory rate	$ (2,203)	$ (4,204)	$ (3,277)
State taxes, net of federal benefit	2	1	(3)
Stock-based compensation	566	408	463
Tax credits	(404)	(530)	(487)
Foreign tax rate differential	1,382	1,663	1,350
GILTI tax		232	1,262
Lapses of applicable statute of limitations	(767)
Non-deductible expenses and other	1	2	1
Income tax expense (benefit) before change in valuation allowance	(1,423)	(2,428)	(691)
Valuation allowance	1,553	2,498	1,063
Provision for income taxes	$ 130	$ 70	$ 372

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Amount of reported income tax expense from difference to expected income tax expense (benefit) computed by applying domestic federal statutory income tax rate to pretax income (loss) from continuing operations, attributable to lapses of applicable statutes of limitations.

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