Leases (Details) - USD ($) $ in Thousands	Jul. 31, 2020	Jan. 31, 2020
Leases
Operating lease right-of-use assets	$ 2,064	$ 2,244
Current portion of operating lease liabilities	887	835
Long-term portion of operating lease liabilities	1,145	1,414
Total lease obligations	$ 2,032	$ 2,249