Company Operations and Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands, shares in Millions			1 Months Ended		3 Months Ended	12 Months Ended
	Sep. 10, 2014 USD ($)	Nov. 06, 2012 USD ($)	Apr. 30, 2015 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 USD ($) Segment shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($)	Sep. 30, 2015 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Number of business segment | Segment						1
Cash and cash equivalents maximum maturity period						3 months
Product shipment costs					$ 4,100	$ 3,900	$ 3,800
Excluded from Computation of Earnings Per Share, Amount | shares						1.0	1.1
Liabilities and Equity						$ 406,505	$ 447,411
Account receivable, reserves						7,500	8,200
Advertising cost expensed					700	$ 700	400
Revenue Recognition Milestone Method Payment Received	$ 10,600		$ 2,400				2,500
Percentage cost plus sale assays to third party						20.00%
Maximum Amount Of Milestone Based Grant Related To Research And Commercialization Activities	$ 12,600	$ 8,300
Prepaid expenses and other current assets						$ 4,344	2,914
Amortization expense						10,200	17,400	$ 16,600
Net of reserves, inventories						700	2,200
Depreciation and Amortization						12,700	10,300	7,900
Impairment loss						0	3,558	0
Fund received for research and development activities		$ 2,600
Unbilled Change Orders, Amount Expected to be Collected after One Year									$ 2,800
Company's grant revenue						5,100	6,300	2,600
Restricted cash						63	3,127
Deferred grant revenue						3,658	6,330
Reimbursement Related To Research And Development Expense						$ 0	400	1,400
Reimbursement percentage upon project development cost						50.00%
Interest in gross margin for sales from third party to end customer						40.00%
Finite-Lived Intangible Asset, Useful Life						3 years 6 months
Restructuring costs and asset impairment charges						$ 0	1,800
Prior period reclassification adjustment							1,500	1,900
2015						9,288
Assets, Current						240,664	274,481
Other non-current assets						731	1,066
Assets						406,505	447,411
Long-term Debt						$ 143,297	137,958
Other Noncurrent Liabilities [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Prior period reclassification adjustment							700
Software development costs [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life						5 years
Capitalized Software Costs [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense						$ 600	600	300
Distribution rights [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Period of instrument supply agreement with Life Technologies Corporation				6 years
Acquisition of distribution rights				$ 800
License agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense					$ 8,000	$ 700	8,000
Finite-Lived Intangible Asset, Useful Life						10 years 7 months
License agreements [Member] | Cost of sales [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense						$ 700	8,000	$ 8,000
Minimum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of the assets						3 years
Maximum [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated useful lives of the assets						15 years
Software and Software Development Costs [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Impairment loss							1,500
Scenario, Previously Reported [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Liabilities and Equity							451,550
Prepaid expenses and other current assets							3,554
Assets, Current							275,121
Other non-current assets							4,565
Assets							451,550
Long-term Debt							142,097
New Accounting Pronouncement, Early Adoption, Effect [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Liabilities and Equity							(4,139)
Prepaid expenses and other current assets							(640)
Assets, Current							(640)
Other non-current assets							(3,499)
Assets							(4,139)
Long-term Debt							$ (4,139)