STOCK-BASED COMPENSATION - Summary of Change in Number of Non-Vested Options to Purchase Shares of Common Stock (Details) - $ / shares shares in Thousands	6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020
STOCK-BASED COMPENSATION
Shares, Non-vested, Beginning balance	467
Shares, Granted	32
Shares, Vested	(117)
Shares, Forfeitures	(6)
Shares, Non-vested, Ending balance	376
Shares, Non-vested	376	549
Weighted Average Fair Value, Non-vested, Beginning balance	$ 8.01
Weighted Average Fair Value, Granted	11.12
Weighted Average Fair Value, Vested	8.06
Weighted Average Fair Value, Forfeitures	7.41
Weighted Average Fair Value, Non-vested, Ending balance	8.27
Weighted Average Fair Value, Non-vested	$ 8.27	$ 8.44