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Note 8 - Debt - Summary of Future Maturities of Loans (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
2021 $ 551  
2022 222  
2023 0  
2024 0  
2025 and thereafter 32,000  
Total 32,773 $ 38,867
Financing Agreement [Member]    
2021 551  
2022 222  
2023 0  
2024 0  
2025 and thereafter 0  
Total 773 947
Revolving Credit Facility [Member]    
2021 0  
2022 0  
2023 0  
2024 0  
2025 and thereafter 32,000  
Total $ 32,000 $ 0