COMMITMENTS - Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022	Jan. 31, 2023
Operating leases, options to extend			true
Operating leases, options to terminate			true
Operating lease, right-of-use assets	$ 4,100		$ 4,100		$ 4,800
Operating lease expense	$ 500	$ 600	$ 1,335	$ 1,871
Weighted average lease term	53 months		53 months		58 months
Weighted average discount rate	3.80%		3.80%		3.70%
Short-term rentals expense	$ 3,400	$ 3,500	$ 10,100	$ 8,800
Unsatisfied bonded performance obligations	500,000		500,000		$ 600,000
GPS | Financial guarantee
Guarantor obligation maximum exposure	$ 3,600		$ 3,600