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Note 2 - Cash, Cash Equivalents and Marketable Securities - Schedule of Cash, Cash Equivalents and Marketable Securities (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Apr. 29, 2017
Jan. 28, 2017
Apr. 30, 2016
Jan. 30, 2016
Book Value $ 8,528 $ 8,501    
Net Unrealized Gains (3) (5)    
Fair Value 8,525 8,496    
Fair value - cash on hand 65,953 62,710    
Total cash, cash equivalents and marketable securities 74,478 71,206    
Cash and cash equivalents 71,697 66,425 $ 56,328 $ 63,790
Short-term marketable securities 2,781 4,781    
UNITED STATES        
Fair value - cash on hand 4,583 9,378    
Overseas [Member]        
Fair value - cash on hand 61,370 53,332    
Money Market Funds [Member]        
Book Value 5,744 3,715    
Net Unrealized Gains    
Fair Value 5,744 3,715    
Corporate Bond Securities [Member]        
Book Value 1,500 3,506    
Net Unrealized Gains (1)    
Fair Value 1,500 3,505    
Fixed Income Funds [Member]        
Book Value 1,284 1,280    
Net Unrealized Gains (3) (4)    
Fair Value $ 1,281 $ 1,276