Note 7 - Intagible Assets - Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 29, 2016	Oct. 31, 2015	Oct. 29, 2016	Oct. 31, 2015
Cost of Sales [Member]
Intangible asset amortization expense	$ 2,025	$ 1,585	$ 6,053	$ 5,467
Operating Expense [Member]
Intangible asset amortization expense	709	349	2,139	1,049
Intangible asset amortization expense	$ 2,734	$ 1,934	$ 8,192	$ 6,516