Note 1 - Basis of Presentation and Recent Accounting Pronouncements (Details Textual) - USD ($) $ in Thousands	Jul. 31, 2019	Feb. 01, 2019
Operating Lease, Right-of-Use Asset	$ 18,097
Operating Lease, Liability, Total	18,900
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset		$ 13,100
Operating Lease, Liability, Total		$ 13,900
Other Current Assets [Member] | Building Held for Sale [Member]
Assets Held-for-sale, Not Part of Disposal Group, Total	$ 1,700