Receivables (Installment Receivables by Class) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Total Installment Receivables
Non-Impaired installment receivables with no related allowance recorded	$ 541	$ 670
Impaired installment receivables with a related allowance recorded	1,702	1,779
Total installment receivables	2,243	2,449
Unpaid Principal Balance
Non-Impaired installment receivables with no related allowance recorded	524	648
Impaired installment receivables with a related allowance recorded	1,702	1,779
Total installment receivables	2,226	2,427
Non-Impaired Financing Receivable, Related Allowance	0	0
Related Allowance for Doubtful Accounts
Impaired installment receivables with a related allowance recorded	1,533	1,514
Interest Income Recognized
Non-Impaired installment receivables with no related allowance recorded	13	92
Impaired installment receivables with a related allowance recorded	0	0
Total installment receivables	13	92
U.S.
Total Installment Receivables
Impaired installment receivables with a related allowance recorded	1,700	1,762
Unpaid Principal Balance
Impaired installment receivables with a related allowance recorded	1,700	1,762
Related Allowance for Doubtful Accounts
Impaired installment receivables with a related allowance recorded	1,531	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	541	670
Impaired installment receivables with a related allowance recorded	2	17
Total installment receivables	543	687
Unpaid Principal Balance
Non-Impaired installment receivables with no related allowance recorded	524	648
Impaired installment receivables with a related allowance recorded	2	17
Total installment receivables	526	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	13	92
Impaired installment receivables with a related allowance recorded	0	0
Total installment receivables	$ 13	$ 92

Financing Receivable, Interest Income, Accrual Method

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Financing Receivable, Recorded Investment

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Financing Receivable, with No Related Allowance, Interest Income, Accrual Method

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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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Non-Impaired Financing Receivable, Related Allowance

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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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