Note 4 - Long-Term Debt and Interest Expense (Details) - Schedule of Long-term Debt - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jul. 01, 2015
Bank loan
Long-term debt, net of current maturities	$ 99,852	$ 104,252
Notes Payable to Banks [Member]
Bank loan
Principal amount	112,800	117,000
Less: unamortized discount and debt costs	(4,157)	(4,568)	$ (4,970)
Total long-term debt	108,643	112,432
Less: current maturities, net of current unamortized discount	(8,791)	(8,180)
Long-term debt, net of current maturities	$ 99,852	$ 104,252