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Note 10 - Leases - Lease Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2020
Oct. 31, 2019
Amortization of ROU assets $ 50 $ 53 $ 151 $ 155
Interest on lease liabilities 17 18 54 36
Operating lease costs 682 579 1,904 1,716
Short-term lease costs (1) [1] 53 140 289 401
Sub-lease income (21) (20) (61) (61)
Total Lease costs $ 781 $ 770 $ 2,337 $ 2,247
[1] Includes variable lease costs, which are immaterial