COMMITMENTS - Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2023	Jul. 31, 2022	Jan. 31, 2023
Operating leases, options to extend			true
Operating leases, options to terminate			true
Operating lease, right-of-use assets	$ 4,500		$ 4,500		$ 4,800
Operating lease expense	400	$ 500	884	$ 1,319
Operating lease payments	$ 400	500	$ 900	1,300
Weighted average lease term	53 months		53 months		58 months
Weighted average discount rate	3.80%		3.80%		3.70%
Future minimum lease payment			$ 700	500
Short-term rentals expense	$ 3,100	$ 3,000	6,800	$ 5,300
Unsatisfied bonded performance obligations	500,000		500,000		$ 600,000
GPS | Financial guarantee
Guarantor obligation maximum exposure	$ 3,600		$ 3,600