Note 2 - Long-term Debt - Long-term Debt (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015
Term Loan [Member]
Long-term debt, gross	$ 41,250,000
Note Payable, Maturing March 8, 2021 [Member]
Long-term debt, gross	3,320,000	2,200,000
Term Loan, Paid March 8, 2016 [Member}
Long-term debt, gross		21,750,000
Long-term debt, gross	44,570,000	23,950,000
Payments due within one year included in current liabilities	5,894,000	2,750,000
Debt issuance costs	65,000	69,000
Long-term debt less current maturities	$ 38,611,000	$ 21,131,000