Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Aggregate maturities of long-term debt and revolving lines of credit) (Details)

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Long-Term Debt (Aggregate maturities of long-term debt and revolving lines of credit) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Long-Term Debt [Abstract]    
2021 $ 4,000  
2022 5,042  
2023 4,000  
2024 21,579  
Total future long-term debt payments 34,621  
Total carrying amount of long-term debt 34,621 $ 22,670
Less current portion (4,000)  
Long-term debt obligations $ 30,621 $ 22,670