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Basis of Presentation and Summary of Significant Accounting Policies (Contract Balances) (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Accounts Receivable
Accounts receivable - contracts with customers	$ 4,038	$ 2,250
Accounts receivable - non-ASC 606	7,511	5,260
Total Accounts Receivable	11,549	7,510
Less: Allowance for doubtful accounts	(325)	(291)
Total Accounts Receivable, net	11,224	7,219
Deferred income	81	81
Revenue recognized	$ 47	$ 176

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