INCOME TAXES - Research and Development Tax Credits (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023
INCOME TAXES
Prior period for identify and quantify the amounts of research and development credits	3 years
Research and development tax credit benefit	$ 16,200
Federal research and development tax credits	5,800
Income tax expense (benefits) associated with research and development activities		$ (3,430)
Contract Assets	4,400
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	13,800
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	2,100	2,600
Unrecognized income tax benefits related to research and development credits	5,000
Settlement offer from the IRS	7,900
Unfavorable tax expense adjustment	6,200
Development tax credit		2,400
Income tax refunds and prepaid income taxes	$ 18,267	$ 15,327