INCOME TAX - Reconciliation of Expected Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Computed expected income tax expense (benefit)	$ 4,797	$ 7,216	$ (24,959)
Increase (reduction) in income taxes resulting from:
State income taxes, net of federal benefit	4,407	2,494	(2,440)
Research and other tax credits	(3,621)	(3,012)	(4,363)
Nondeductible expenses	1,114	2,169	669
Stock-based compensation	4,056	2,013	3,486
Non-U.S. subsidiaries taxed at other rates	(757)	(1,036)	491
Adjustment to valuation allowances	12,460	14,209	33,197
Other, net	2,886	217	(829)
Total	$ 25,342	$ 24,270	$ 5,252