Accounts Receivable and Contract Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Accounts Receivable and Contract Assets [Abstract]
Accounts receivable - customers	$ 4,334	$ 4,574
Life insurance receivable	671	0
Other receivables	213	152
Accounts receivable	5,218	4,726
Less: allowance for doubtful accounts	(343)	(305)
Accounts receivable, net	4,875	4,421
Unbilled revenue	2,693	$ 2,276
Change in accounts receivable - customers	(240)
Change in life insurance receivable	671
Change in other receivables	61
Change in accounts receivable	492
Change in allowance for doubtful accounts	(38)
Change in accounts receivable, net	454
Change in unbilled revenue	$ 417