Note 7 - Long-Term Debt (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Jun. 24, 2013	Jun. 25, 2010
Credit Agreement, Term			3 years
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 15,000,000
Debt Instrument, Interest Rate, Stated Percentage	0.90%
Debt Instrument, Reference Rate, Term	1 month
Line of Credit Facility, Commitment Fee Percentage	0.15%
Line of Credit Facility, Amount Outstanding (in Dollars)	$ 0
Debt Instruments, Term		1 year
Credit Agreement, Tangible Net Worth Ratio	0.75
Credit Agreement, Fixed Charges Coverage Ratio	2.5
LIBOR [Member]
Debt Instrument, Interest Rate, Stated Percentage	1.15%