Note 5 - Long-Term Debt (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	0 Months Ended	3 Months Ended	6 Months Ended			3 Months Ended	6 Months Ended
	Jan. 31, 2013	Sep. 01, 2013	Sep. 01, 2013	Sep. 01, 2013 Letter of Credit [Member]	Jan. 31, 2013 Letter of Credit [Member]	Jun. 02, 2013 Nelco Products Pte. Ltd. [Member]	Sep. 01, 2013 London Interbank Offered Rate (LIBOR) [Member]	Sep. 01, 2013 Daily LIBOR Plus [Member]	Sep. 01, 2013 Federal Funds Rate [Member]
Note 5 - Long-Term Debt (Details) [Line Items]
Line of Credit Facility, Expiration Period	5 years
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 52,000				$ 2,000
Line of Credit Facility, Amount Outstanding (in Dollars)		52,000	52,000	1,145
Number Of Stand by Letter Of Credit Issued				2
Debt Instrument, Basis Spread on Variable Rate							1.15%	1.00%	0.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage			0.20%
Minimum Interest Coverage Ratio		3.00 to 1.00	3.00 to 1.00
Maximum Funded Debt Ratio		3.00 to 1.00	3.00 to 1.00
Dividend Covenant Maximum Quarterly Dividend (in Dollars per share)			$ 0.10
Pledge Of Stock Percentage As Guarantee For Credit Agreement						65.00%
Line of Credit Facility, Interest Rate at Period End		1.37%	1.37%
Interest Expense (in Dollars)		$ 185	$ 356