STOCK-BASED COMPENSATION - Summary of Change in Number of Non-Vested Options to Purchase Shares of Common Stock (Details) - $ / shares shares in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
STOCK-BASED COMPENSATION
Shares, Non-vested, Beginning balance	295
Shares, Granted	38
Shares, Vested	(94)
Shares, Non-vested, Ending balance	239
Shares, Non-vested	239	379
Weighted Average Fair Value, Non-vested, Beginning balance	$ 7.80
Weighted Average Fair Value, Granted	6.68
Weighted Average Fair Value, Vested	8.24
Weighted Average Fair Value, Non-vested, Ending balance	7.45
Weighted Average Fair Value, Non-vested	$ 7.45	$ 8.25