Allowance for Credit Losses - Summary of Finance Receivables by Aging Category (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Line Items]
Past due	$ 1,039	$ 257
Current	12,996	8,806
Total balance	14,035	9,063
31-60 Days [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Past due	0	185
61-90 Days [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Past due	1,000	7
91 Days and Over [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Past due	$ 39	$ 65