COMMITMENTS - Leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021	Jan. 31, 2022
Operating leases, options to extend			true
Operating leases, options to terminate			true
Operating lease expense	$ 600	$ 1,100	$ 1,871	$ 3,017
Operating lease payments	$ 600	1,100	$ 1,900	3,000
Weighted average lease term	78 months		78 months
Weighted average discount rate	2.20%		2.20%
Future minimum lease payment			$ 900	2,400
Unsatisfied bonded performance obligations	$ 100,000		100,000		$ 200,000
Annual rental rate	600		600
Rent expense	3,500	$ 1,700	$ 8,800	$ 6,600
London Interbank Offered Rate (LIBOR)
Interest rate margin on referred rate			1.60%
TRC
Annual rental rate	500		$ 500
GPS | Financial guarantee
Guarantor obligation maximum exposure	$ 3,600		$ 3,600