Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 19,684	$ 19,509
Accumulated Amortization	(15,175)	(11,943)
Trade Name/Trademarks [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	780	780
Accumulated Amortization	(574)	(424)
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,620	2,620
Accumulated Amortization	(2,318)	(2,136)
Developed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,696	15,696
Accumulated Amortization	(11,856)	(8,976)
Non-compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	400	400
Accumulated Amortization	(400)	(400)
Pod Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	175
Accumulated Amortization	(17)
Export License [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	13	13
Accumulated Amortization	$ (10)	$ (7)