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CARES Act (Details) - USD ($)
12 Months Ended
Apr. 20, 2020
Dec. 31, 2020
Dec. 31, 2019
CARES Act      
Proceeds from Issuance of Other Long-term Debt $ 2,900,000 $ 2,929,000 $ 0
Debt Instrument, Interest Rate, Stated Percentage   1.00%  
Long-term Debt, Current Maturities   $ 1,983,000 0
Long-term Debt, Excluding Current Maturities   $ 946,000 $ 0