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Note 2 - Long-term Debt - Long-term Debt (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Long-term debt, gross $ 119,667 $ 117,693
Payments due within one year included in current liabilities 15,286 6,000
Debt issuance costs 569 171
Long-term debt less current maturities 103,812 111,522
Note Payable Maturing May 2023 [Member] | BB&T [Member]    
Long-term debt, gross 34,035 1,193
Term Loan Maturing January 22, 2026 [Member] | BB&T [Member]    
Long-term debt, gross 33,857 1,193
Term Loan Maturing February 26, 2024 [Member] | BB&T [Member]    
Long-term debt, gross 27,000 31,500
Term Loan Maturing May 2020 [Member] | BB&T [Member]    
Long-term debt, gross $ 58,810 $ 85,000