Discontinued Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Service revenue	$ 1,462	$ 1,254	$ 1,871
Sales revenue	5,708	10,736	2,638
Total revenue	7,170	11,990	4,509
Cost of services, exclusive of depreciation expense shown below	1,163	709	2,168
Cost of product sales, exclusive of depreciation expense shown below	5,696	8,573	2,973
Depreciation and Amortization	115	416	584
Other Expense (income)	72	(180)	56
Operating Income (loss)	124	2,472	(1,272)
Income tax expense	182	361	(107)
Income (loss) from discontinued operations, net of income taxes	(58)	2,111	(1,165)
Current assets	3,712	2,549
Non-current assets	1,848	1,048
Total assets	5,560	3,597
Current liabilities	1,633	221
Non-current liabilities	82	75
Total liabilities	1,715	296
Cash provided by (used in) operating activities, discontinued operations	$ 200	$ 2,500	$ (600)