Note 2 - Long-term Debt - Long-term Debt (Details) - USD ($)	Sep. 30, 2017	Dec. 31, 2016
Long-term debt, gross	$ 39,000,000	$ 42,183,000
Payments due within one year included in current liabilities	6,000,000	5,893,000
Debt issuance costs	44,000	63,000
Long-term debt less current maturities	32,956,000	36,227,000
Term Loan Paid February 28, 2017 [Member] | Fifth Third Bank [Member]
Long-term debt, gross		39,643,000
Note Payable Paid February 28, 2017 [Member] | Fifth Third Bank [Member]
Long-term debt, gross		2,540,000
Term Loan Maturing February 26, 2024 [Member] | BB&T [Member]
Long-term debt, gross	39,000,000
Note Payable Maturing February 25, 2022 [Member] | BB&T [Member]
Long-term debt, gross