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INCOME TAXES - Income Tax Expense Reconciliation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2022
Oct. 31, 2021
Oct. 31, 2022
Oct. 31, 2021
INCOME TAXES        
Federal corporate income tax rate (as percent)     21.00% 21.00%
Computed expected income tax expense     $ (7,135) $ (9,924)
State income taxes, net of federal tax effect     (486) (1,015)
Research and development credits adjustment     (6,181)  
Deferred tax adjustments     (68)  
Other permanent differences and adjustments, net     (640) (289)
Income tax expense $ (2,551) $ (3,269) $ (14,510) $ (11,228)