Note 17 - Fair Value of Financial Instruments and Non-Financial Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	9 Months Ended			22 Months Ended
	May 18, 2012	Mar. 30, 2014	Dec. 02, 2013	Feb. 28, 2015 Scenario, Forecast [Member] Cash Flow Hedging [Member] Interest Rate Swap [Member]	Feb. 28, 2015 Scenario, Forecast [Member]	May 31, 2013 Cash Flow Hedging [Member] Interest Rate Swap [Member]	May 18, 2012 Cash Flow Hedging [Member] Interest Rate Swap [Member]	Mar. 30, 2014 Accrued Expenses [Member] Dillion [Member]	Mar. 30, 2014 Other Noncurrent Liabilities [Member] Dillion [Member]	Mar. 30, 2014 Other Noncurrent Liabilities [Member]	Dec. 31, 2014 Dillion [Member]	Dec. 29, 2013 Dillion [Member]
Note 17 - Fair Value of Financial Instruments and Non-Financial Assets and Liabilities (Details) [Line Items]
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge	5 years
Derivative, Notional Amount				$ 50,000		$ 85,000	$ 50,000
Quarterly Decrease in Notional Amount of Interest Rate Cash Flow Hedge Derivatives					5,000
Derivative, Swaption Interest Rate	1.06%
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net		433
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net		386
Business Combination, Contingent Consideration, Liability			$ 2,500					$ 562	$ 2,025	$ 2,025	$ 2,587	$ 2,500