Note 10 - Leases - Supplemental Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Jan. 31, 2019
Property and Equipment - net	$ 29,125	$ 30,398
Finance lease liability short-term	216
Finance lease liability long-term	216
Total finance lease liabilities	432
Operating lease right-of-use asset	11,453
Operating lease liability short-term	1,056
Operating lease liability long-term	10,446
Total operating lease liabilities	11,502
Finance Leases Assets [Member]
Property and Equipment - gross	854
Accumulated depreciation and amortization	(451)
Property and Equipment - net	$ 403