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INCOME TAXES - Reconciliation of the beginning and ending amounts of gross unrecognized tax benefits (Details) - USD ($)
$ in Thousands
12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Balance at February 1, $ 2,293 $ 2,111  
Additions for tax positions of prior years 595 182 $ 2,111
Lapses of statutes of limitations (446)    
Balance at January 31, $ 2,442 $ 2,293 $ 2,111