Note 12 - Basic and Diluted Net Loss Per Share (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 30, 2016	Jan. 31, 2015	Feb. 01, 2014
Net income (loss), as reported	$ 158	$ (21,701)	$ (11,049)
Weighted-average common shares outstanding- basic (in shares)	35,890,000	34,693,000	34,206,000
Dilutive effect of employee stock plans (in shares)	779,000
Weighted-average common shares outstanding- diluted (in shares)	36,669,000	34,693,000	34,206,000
Net income (loss) per share - basic (in dollars per share)	$ 0	$ (0.63)	$ (0.32)
Net income (loss) per share - diluted (in dollars per share)	$ 0	$ (0.63)	$ (0.32)