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6. INCOME TAXES - Statutory income tax (Details) - USD ($) $ in Thousands | 12 Months Ended
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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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- Definition 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. + References No definition available. + Details
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