Note 6 - Long-Term Debt (Details) - USD ($)	Dec. 31, 2015	Dec. 31, 2014
Term Loan [Member]
Long-term debt, gross	$ 21,750,000	$ 24,375,000
Note Payable Maturing July 1, 2016 [Member]
Long-term debt, gross		440,000
Note Payable Maturing July 1, 2018 [Member]
Long-term debt, gross	$ 2,200,000	220,000
Long-term debt, gross	23,950,000	25,035,000
Less payments due within one year included in current liabilities	2,750,000	2,375,000
Long-term debt less current maturities	$ 21,200,000	$ 22,660,000