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Summary of Significant Accounting Policies (Contract Balances) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Accounts Receivable
Accounts receivable - contracts with customers	$ 3,176	$ 3,061
Accounts receivable - ASC 842	9,470	6,963
Total Accounts Receivable	12,646	10,024
Less: Allowance for doubtful accounts	(972)	(918)
Total Accounts Receivable, net	11,674	9,106
Deferred income	125	640
Revenue recognized	$ 73	$ 48

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