Organization and Basis of Presentation (Details Textual)	6 Months Ended
	Jun. 30, 2017 USD ($) Segment	Dec. 31, 2016 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of operating segment | Segment	1
Working Capital	$ 88,216,000
Accumulated deficit	(387,176,000)	$ (355,270,000)
Cash, Cash Equivalents, and Short-term Investments	106,518,000
Restricted cash	758,000
Excess tax benefit, amount	$ 1,979,000
Sufficient capital to fund its operations	one
Products Warranty Period - Reagents	P60D
Product Warranty Period - Instruments	P1Y
Finite Lived Intangible Asset Amortization Period	10 years