Current Expected Credit Losses - Schedule of Net Investment in Leases and Financed Sale Receivables with Billed Amounts Past Due Continues to Accrue Finance Income (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	$ 18,703		$ 10,245
Unbilled	113,184		118,863
Allowance for Credit Losses	(5,147)		(1,070)
Total financing receivables	126,740		128,038
Net Investment in Leases [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	1,346		349
Unbilled	16,253		15,412
Allowance for Credit Losses	(504)	$ (459)	(155)	$ (155)	$ (155)	$ (155)
Total financing receivables	17,095		15,606
Net Financed Sales Receivables [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	17,357		9,896
Unbilled	96,931		103,451
Allowance for Credit Losses	(4,643)	$ (3,709)	(915)	$ (915)	$ (839)	$ (839)
Total financing receivables	109,645		112,432
Accrued and Current [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	1,818		1,708
Accrued and Current [Member] | Net Investment in Leases [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	132		30
Accrued and Current [Member] | Net Financed Sales Receivables [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	1,686		1,678
30 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	2,520		2,840
30 to 89 Days Past Due [Member] | Net Investment in Leases [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	161		68
30 to 89 Days Past Due [Member] | Net Financed Sales Receivables [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	2,359		2,772
Equal To Greater Than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	14,365		5,697
Equal To Greater Than 90 Days Past Due [Member] | Net Investment in Leases [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	1,053		251
Equal To Greater Than 90 Days Past Due [Member] | Net Financed Sales Receivables [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	13,312		5,446
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	17,294		8,238
Unbilled	82,144		29,751
Allowance for Credit Losses	(2,501)
Total financing receivables	96,937		37,989
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | Net Investment in Leases [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	1,011		279
Unbilled	12,181		578
Allowance for Credit Losses	(290)
Total financing receivables	12,902		857
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | Net Financed Sales Receivables [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	16,283		7,959
Unbilled	69,963		29,173
Allowance for Credit Losses	(2,211)
Total financing receivables	84,035		37,132
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | Accrued and Current [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	1,507		1,155
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | Accrued and Current [Member] | Net Investment in Leases [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	123		9
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | Accrued and Current [Member] | Net Financed Sales Receivables [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	1,384		1,146
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | 30 to 89 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	2,050		1,309
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | 30 to 89 Days Past Due [Member] | Net Investment in Leases [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	142		19
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | 30 to 89 Days Past Due [Member] | Net Financed Sales Receivables [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	1,908		1,290
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | Equal To Greater Than 90 Days Past Due [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	13,737		5,774
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | Equal To Greater Than 90 Days Past Due [Member] | Net Investment in Leases [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	746		251
Net Investment in Leases and Financed Sale Receivables Continue to Accrue Finance Income [Member] | Equal To Greater Than 90 Days Past Due [Member] | Net Financed Sales Receivables [Member]
Financing Receivable Recorded Investment Past Due [Line Items]
Billed	$ 12,991		$ 5,523