Accounts Receivable, Net (Schedule of Accounts Receivable) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Net [Abstract]
Accounts receivable	$ 4,105	$ 3,325
Less allowance for doubtful accounts	(139)	(139)
Accounts receivable, net	$ 3,966	$ 3,186