Note 11 - Shareholders' Equity and Employee Benefits (Details Textual)			3 Months Ended						12 Months Ended
	May 02, 2015 USD ($)	Jan. 31, 2015 USD ($)	May 02, 2015 Endowment Insurance Pension Plan [Member] USD ($)	May 02, 2015 Endowment Insurance Pension Plan [Member] CNY	May 03, 2014 Endowment Insurance Pension Plan [Member] USD ($)	May 02, 2015 Retirement Pension Plan [Member] USD ($)	May 03, 2014 Retirement Pension Plan [Member] USD ($)	May 02, 2015 Severance Plan [Member] USD ($)	Mar. 24, 2015 Stock Purchased under Employee Stock Purchase Plan Subject to Recessionary Rights [Member] Purchase Plan 2010 [Member] USD ($)
Defined Contribution Plan, Employer Discretionary Contribution Amount			$ 500,000		$ 500,000	$ 200,000	$ 200,000
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent			8.00%	8.00%
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay			21.00%	21.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount				16,353
Supplemental Unemployment Benefits, Severance Benefits								700,000
Defined Benefit Plan, Assets for Plan Benefits								700,000
Stock Issued During Period, Shares Employee Stock Purchase Plan									102,078
Stock Issued During Period, Price Per Share, Employee Stock Purchase Plan									$ 3.89
Employee-related Liabilities, Current	7,952,000	6,806,000							400,000
Deferred Compensation Share-based Arrangements, Liability, Current	$ 400,000