Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Receivables [Abstract]
Accounts receivable, customers	$ 4,979	$ 5,651
Allowance for doubtful accounts	(2,047)	(1,582)
Accounts receivable, net	$ 2,932	$ 4,069