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	Aug. 03, 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	$ 46,246	$ 54,019
Restricted cash	1,771	1,769
Derivative instruments	267	438
Total assets/liabilities measured at fair value	48,284	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	46,246	54,019
Restricted cash	1,771	1,769
Total assets/liabilities measured at fair value	48,017	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	267	438
Total assets/liabilities measured at fair value	267	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	31,225	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	31,225	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	13,228	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	13,228	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	519	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	519	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	1,274	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	$ 1,274	$ 1,279