Note 2 - Cash, Cash Equivalents and Marketable Securities - Cash, Cash Equivalents and Marketable Securities (Details) - USD ($)	6 Months Ended	12 Months Ended
	Aug. 01, 2015	Jan. 31, 2015
Corporate Bond Securities [Member]
Book Value	$ 16,154,000	$ 9,130,000
Net Unrealized Gains	82,000	153,000
Fair Value	16,236,000	9,283,000
Money Market Funds [Member]
Book Value	261,000	7,650,000
Fair Value	261,000	7,650,000
Fixed Income Funds [Member]
Book Value	1,275,000	1,324,000
Net Unrealized Gains	8,000	(11,000)
Fair Value	1,283,000	1,313,000
UNITED STATES
Fair value - cash on hand	8,468,000	12,042,000
Overseas [Member]
Fair value - cash on hand	56,510,000	63,810,000
Book Value	17,690,000	18,104,000
Net Unrealized Gains	90,000	142,000
Fair Value	17,780,000	18,246,000
Fair value - cash on hand	64,978,000	75,852,000
Total cash, cash equivalents and marketable securities	82,758,000	94,098,000
Cash and cash equivalents	65,239,000	83,502,000
Short-term marketable securities	11,928,000	6,347,000
Long-term marketable securities	$ 5,591,000	$ 4,249,000