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Note 10 - Leases - Lease Costs (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Amortization of ROU assets $ 53 $ 51 $ 101 $ 102
Interest on lease liabilities 18 8 37 17
Operating lease costs 610 581 1,222 1,132
Short-term lease costs (1) [1] 213 82 236 266
Sub-lease income (20) (20) (40) (40)
Total Lease costs $ 874 $ 702 $ 1,556 $ 1,477
[1] Includes variable lease costs, which are immaterial