Note 7- Business Combination, Goodwill and Intangible Assets (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2017	Jan. 30, 2016	Jan. 31, 2015
Goodwill	$ 10,594	$ 11,068
Goodwill, Impairment Loss	0	0
Intellectual Property [Member]
Impairment of Intangible Assets, Finite-lived	800	400	$ 700
Bretelon, Inc. [Member]
Business Combination, Consideration Transferred		19,400
Goodwill	10,600	11,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		12,600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		$ 4,300
Goodwill, Purchase Accounting Adjustments	$ (500)