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	Nov. 02, 2013	Feb. 02, 2013
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	$ 44,364	$ 54,019
Restricted cash	1,771	1,769
Derivative instruments	132	438
Total assets/liabilities measured at fair value	46,267	56,226
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	44,364	54,019
Restricted cash	1,771	1,769
Total assets/liabilities measured at fair value	46,135	55,788
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	132	438
Total assets/liabilities measured at fair value	132	438
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	34,183	31,179
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	34,183	31,179
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	8,377	21,032
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	8,377	21,032
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	517	529
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	517	529
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	1,287	1,279
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	$ 1,287	$ 1,279