Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Gross Carrying Amount	$ 5,069	$ 5,053
Accumulated Amortization	(3,962)	(3,768)
Finite-Lived Intangible Assets, Net	$ 1,107	1,285
Patent [Member]
Weighted Average Amortization Period (Years)	11 years
Gross Carrying Amount	$ 740	728
Accumulated Amortization	(353)	(336)
Finite-Lived Intangible Assets, Net	$ 387	392
Software [Member]
Weighted Average Amortization Period (Years)	3 years
Gross Carrying Amount	$ 414	410
Accumulated Amortization	(407)	(403)
Finite-Lived Intangible Assets, Net	$ 7	7
Customer Relationships [Member]
Weighted Average Amortization Period (Years)	10 years
Gross Carrying Amount	$ 3,370	3,370
Accumulated Amortization	(2,657)	(2,491)
Finite-Lived Intangible Assets, Net	$ 713	879
Permit [Member]
Weighted Average Amortization Period (Years)	10 years
Gross Carrying Amount	$ 545	545
Accumulated Amortization	(545)	(538)
Finite-Lived Intangible Assets, Net		$ 7