Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Feb. 01, 2014
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments	$ 18,246	$ 36,817
Restricted cash	400	1,775
Derivative instruments asset		35
Total assets/liabilities measured at fair value	18,646	38,627
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments	9,283	21,494
Corporate Bond Securities [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments	9,283	21,494
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments	7,650	13,521
Money Market Funds [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments	7,650	13,521
Fixed Income Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments	1,313	1,294
Fixed Income Funds [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments	1,313	1,294
Municipal Bonds and Notes [Member] | Fair Value, Inputs, Level 1 [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments		508
Municipal Bonds and Notes [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments		508
Fair Value, Inputs, Level 1 [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Cash equivalents and short-term investments	18,246	36,817
Restricted cash	400	1,775
Total assets/liabilities measured at fair value	18,646	38,592
Fair Value, Inputs, Level 2 [Member]
Note 3 - Fair Values of Assets and Liabilities (Details) - Assets and Liabilities Measured at Fair Value on a Recurring Basis [Line Items]
Derivative instruments asset		35
Total assets/liabilities measured at fair value		$ 35