STOCK-BASED COMPENSATION - Summary of Change in Number of Non-Vested Options to Purchase Shares of Common Stock (Details) - $ / shares shares in Thousands	9 Months Ended
	Oct. 31, 2021	Oct. 31, 2020
STOCK-BASED COMPENSATION
Shares, Non-vested, Beginning balance	467
Shares, Granted	32
Shares, Vested	(163)
Shares, Forfeitures	(8)
Shares, Non-vested, Ending balance	328
Shares, Non-vested	328	499
Weighted Average Fair Value, Non-vested, Beginning balance	$ 8.01
Weighted Average Fair Value, Granted	11.12
Weighted Average Fair Value, Vested	8.43
Weighted Average Fair Value, Forfeitures	7.05
Weighted Average Fair Value, Non-vested, Ending balance	8.13
Weighted Average Fair Value, Non-vested	$ 8.13	$ 8.35