Financing Receivables - Schedule of Financing Receivables (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Financing receivable, minimum initial term	1 year
Financing receivables	$ 30,052		$ 28,856
Allowance for doubtful accounts	(7,131)	$ (6,371)	(5,909)	$ (6,395)
Financing receivables, net of allowances	22,921		$ 22,947
Financing receivable sold	$ 0	$ 0