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Note 3 - Long-term Debt - Long-term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Long-term debt, gross $ 114,188 $ 88,113
Payments due within one year included in current liabilities 15,286 15,286
Debt issuance costs 697 455
Long-term debt less current maturities 98,205 72,372
Truist Bank [Member] | Term Loan Maturing February 26, 2024 [Member]    
Long-term debt, gross 18,000 21,000
Truist Bank [Member] | Term Loan Maturing January 22, 2026 [Member]    
Long-term debt, gross 44,881 49,524
Truist Bank [Member] | Revolving Credit Facility [Member]    
Long-term debt, gross $ 51,307 $ 17,589