Current Expected Credit Losses - Schedule of Financing Receivables (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Net investment in leases
Gross minimum payments due under sales-type leases	$ 18,476	$ 16,766
Unearned finance income	(877)	(1,005)
Present value of minimum payments due under sales-type leases	17,599	15,761
Allowance for credit losses	(504)	(155)
Net investment in leases	17,095	15,606
Financed sales receivables
Gross minimum payments due under financed sales	144,394	146,660
Unearned finance income	(30,106)	(33,313)
Present value of minimum payments due under financed sales	114,288	113,347
Allowance for credit losses	(4,643)	(915)
Net financed sales receivables	109,645	112,432
Total financing receivables	126,740	128,038
Net financed sales receivables due within one year	34,197	27,595
Net financed sales receivables due after one year	75,448	84,837
Net financed sales receivables	$ 109,645	$ 112,432