COMMITMENTS - Leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Operating leases, options to extend			true
Operating leases, options to terminate			true
Operating lease expense			$ 793	$ 382
Weighted average lease term	34 months		34 months
Weighted average discount rate	3.40%		3.40%
Operating lease payments			$ 800	400
December 31, 2023	$ 769		$ 769
London Interbank Offered Rate (LIBOR)
Interest rate margin on referred rate			2.00%
TRC
April 30, 2021	300		$ 300
GPS
Future minimum lease payment	1,100		1,500
GPS | Financial guarantee
Guarantor obligation maximum exposure	3,600		3,600
Costs of Revenues
Operating Lease And Short-Term Rental Agreements Expense	1,400	$ 1,300	2,000	2,300
Rent expense	1,400	1,300	2,000	2,300
Selling, General and Administrative Expenses
Operating Lease And Short-Term Rental Agreements Expense	200	200	400	400
Rent expense	$ 200	$ 200	$ 400	$ 400