INCOME TAXES - Components of Company's Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Current:
Federal	$ 3,603	$ (32,490)	$ (29,681)
State	(1,091)	(7,853)	(6,188)
Total	2,512	(40,343)	(35,869)
Deferred:
Federal	971	2	(1,277)
State	1,168	62	40
Total	2,139	64	(1,237)
Income tax benefit (expense)	$ 4,651	$ (40,279)	$ (37,106)