Note 14 - Gain on Sale of Operating Facility (Details Textual)		3 Months Ended
	Jul. 29, 2016 USD ($) ft²	Jul. 31, 2017 USD ($)	Jul. 31, 2016 USD ($)	Feb. 29, 2016 ft²
Proceeds from Sale of Property, Plant, and Equipment			$ 11,555,000
Seagis Property Group LP (the "Landlord") [Member]
Area of Real Estate Property | ft²				24,110
Fulfillment and Warehouse Facility [Member]
Area of Real Estate Property | ft²	85,000
Proceeds from Sale of Property, Plant, and Equipment	$ 11,555,000
Gain Loss on Disposition of Assets, Net of Tax			$ 5,280,000