INCOME TAX - Reconciliation of Deferred Tax Assets/Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2025	Mar. 31, 2024
Deferred tax assets:
Accrued expenses	$ 5,072	$ 5,849
Lease liabilities	8,453	10,107
Net operating loss carryforwards	35,268	30,408
Stock-based compensation	8,734	7,346
Nonqualified deferred compensation	2,788	2,809
Tax credit carryforwards	10,641	9,764
Capitalized research and development	58,556	45,499
Other	2,236	1,477
Total deferred tax assets	131,748	113,259
Less valuation allowance	(105,040)	(81,284)
Net deferred tax assets	26,708	31,975
Deferred tax liabilities:
Prepaid expenses	(3,546)	(2,821)
Property and equipment	(1,412)	(1,976)
Right-of-use assets	(4,657)	(6,186)
Intangible assets	(4,019)	(7,118)
Deferred commissions	(11,153)	(12,098)
Other	(181)	(364)
Total deferred tax liabilities	(24,968)	(30,563)
Net deferred tax assets	$ 1,740	$ 1,412