Revenues and Trade Receivables, Net, Accounts Receivable Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Revenues and Trade Receivables, Net [Roll Forward]
Beginning balance	$ 0	$ 0
Provision related to sales in 2018	104	0
Credits and payments	0	0
Ending balance	$ 104	$ 0