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Note 9 - Term Loans and Line of Credit Agreements - Summary of Term Loan and Line of Credit Agreements (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Long-term debt, gross $ 23,908  
Debt issuance costs (373)  
Term Loan Agreement 23,535  
Less current portion of long-term debt, gross 1,636 $ 1,057
Less current portion debt issuance costs (42) (42)
Current portion of long-term debt 1,594 1,015
Long-term debt, gross, net of current portion 22,272 21,943
Debt issuance costs, net of current portion (331) (373)
Long-term debt 21,941 21,570
Less current portion of long-term debt   1,015
Long-term debt, net of current portion   21,570
Term Loan Agreement [Member]    
Long-term debt, gross 21,944  
Debt issuance costs (373)  
Term Loan Agreement 21,571  
New Term Loan Agreement [Member]    
Long-term debt, gross   23,000
Debt issuance costs   (415)
Long-term debt   $ 22,585
Paycheck Protection Program CARES Act [Member]    
Long-term debt, gross 1,964  
Debt issuance costs  
Term Loan Agreement $ 1,964