INCOME TAXES - Research and Development Tax Credits (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	May 31, 2022	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2020
INCOME TAXES
Prior period for identify and quantify the amounts of research and development credits		3 years
Research and development tax credit benefit			$ 16,600
Adjustment made to income tax benefit recognized related to research and development credits				$ 400
Federal research and development tax credits		$ 5,800
Income tax expense (benefits) associated with research and development activities		(3,430)
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
Income tax refunds and prepaid income taxes		$ 15,327	$ 29,451