Acquisition (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jun. 22, 2015	Dec. 31, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Return amount from escrow account of purchase price		$ 125
Aggregate Fair Value of Assets Acquired and the Liabilities Assumed [Abstract]
Goodwill		$ 8,803	$ 8,928
Product Technology [Member]
Business Acquisition [Line Items]
Estimated useful life		5 years
Core Technology [Member]
Business Acquisition [Line Items]
Estimated useful life		10 years
Trade Names [Member]
Business Acquisition [Line Items]
Estimated useful life		10 years
Customer Relationships [Member]
Business Acquisition [Line Items]
Estimated useful life		10 years
XTRAC and VTRAC [Member]
Business Acquisition [Line Items]
Acquisition price	$ 42,528
Return amount from escrow account of purchase price	125
Aggregate Fair Value of Assets Acquired and the Liabilities Assumed [Abstract]
Current assets	7,233
Property, plant and equipment	14,340
Identifiable intangible assets	16,100
Other assets	45
Total assets assumed	37,718
Current liabilities	(3,945)
Note payable	(57)
Other long term liabilities	(116)
Total liabilities assumed	(4,118)
Net assets acquired	33,600
Goodwill	$ 8,803
Unaudited Pro-forma Results [Abstract]
Net revenues			33,163
Net loss attributable to common stockholders			$ (34,252)
Net loss per basic and diluted share: (in dollars per share)			$ (4.01)
Shares used in calculating net loss per basic and diluted share: (in shares)			8,536,699
XTRAC and VTRAC [Member] | Product Technology [Member]
Business Acquisition [Line Items]
Estimated useful life		5 years
XTRAC and VTRAC [Member] | Core Technology [Member]
Business Acquisition [Line Items]
Estimated useful life		10 years
XTRAC and VTRAC [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Estimated useful life		10 years
XTRAC and VTRAC [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Estimated useful life		10 years