Receivables (Installment Receivables by Class) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Total Installment Receivables
Non-Impaired installment receivables with no related allowance recorded	$ 336	$ 670
Impaired installment receivables with a related allowance recorded	743	1,779
Total installment receivables	1,079	2,449
Unpaid Principal Balance
Non-Impaired installment receivables with no related allowance recorded	326	648
Impaired installment receivables with a related allowance recorded	743	1,779
Total installment receivables	1,069	2,427
Non-Impaired Financing Receivable, Related Allowance	0	0
Related Allowance for Doubtful Accounts
Impaired installment receivables with a related allowance recorded	615	1,514
Interest Income Recognized
Non-Impaired installment receivables with no related allowance recorded	20	92
Impaired installment receivables with a related allowance recorded	0	0
Total installment receivables	20	92
U.S.
Total Installment Receivables
Impaired installment receivables with a related allowance recorded	741	1,762
Unpaid Principal Balance
Impaired installment receivables with a related allowance recorded	741	1,762
Related Allowance for Doubtful Accounts
Impaired installment receivables with a related allowance recorded	613	1,497
Interest Income Recognized
Impaired installment receivables with a related allowance recorded	0	0
CANADA
Total Installment Receivables
Non-Impaired installment receivables with no related allowance recorded	336	670
Impaired installment receivables with a related allowance recorded	2	17
Total installment receivables	338	687
Unpaid Principal Balance
Non-Impaired installment receivables with no related allowance recorded	326	648
Impaired installment receivables with a related allowance recorded	2	17
Total installment receivables	328	665
Non-Impaired Financing Receivable, Related Allowance	0	0
Related Allowance for Doubtful Accounts
Impaired installment receivables with a related allowance recorded	2	17
Interest Income Recognized
Non-Impaired installment receivables with no related allowance recorded	20	92
Impaired installment receivables with a related allowance recorded	0	0
Total installment receivables	$ 20	$ 92

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Financing Receivable, Recorded Investment

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Financing Receivable, with No Related Allowance, Recorded Investment

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Impaired Financing Receivable, Related Allowance [Abstract]

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Amount of allowance for credit losses related to recorded investment.

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Amount of interest income, recognized on accrual basis, on financing receivables, for which there is a related allowance for credit losses and are recognized as impaired.

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Amount of investment in impaired financing receivables for which there is a related allowance for credit losses.

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Unpaid principal balance of impaired financing receivables for which there is a related allowance for credit losses.

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