COMMITMENTS - Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Operating leases, options to extend	true
Operating leases, options to terminate	true
Operating lease expense	$ 750	$ 776
Operating lease payments	$ 800	800
Weighted average lease term	44 months
Weighted average discount rate	2.40%
Future minimum lease payment	$ 200	500
Unsatisfied bonded performance obligations	187,000
April 30, 2022	456
Bonds outstanding, covering other risks	$ 1,100
London Interbank Offered Rate (LIBOR)
Interest rate margin on referred rate	1.60%
TRC
April 30, 2022	$ 300
GPS | Financial guarantee
Guarantor obligation maximum exposure	3,600
Costs of Revenues [Member]
Rent expense	2,900	3,000
Selling, General and Administrative Expenses [Member]
Rent expense	$ 200	$ 200