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Leases (Details 3) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Leases    
Gross financing receivables $ 1,669 $ 1,774
Less unearned income (508) (582)
Financing receivables, net 1,161 1,192
Less: current portion of finance receivables, net (324) 286
Finance receivables due after one year $ 837 $ 906