Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Property and equipment [Line Items]
Property and equipment, gross	$ 18,030		$ 14,454
Less accumulated depreciation	(5,907)		(4,979)
Property and equipment, net	12,123		9,475
Other liabilities	$ 895		1,148
Interest rate for leases, minimum (percent)	3.00%
Interest rate for leases, maximum (percent)	12.00%
Depreciation	$ 734	$ 354
Leasehold improvements
Property and equipment [Line Items]
Property and equipment, gross	3,233		2,684
Lab and clean room equipment
Property and equipment [Line Items]
Property and equipment, gross	7,528		4,564
Furniture and office equipment
Property and equipment [Line Items]
Property and equipment, gross	5,730		4,577
Construction in progress
Property and equipment [Line Items]
Property and equipment, gross	1,539		$ 2,629
Assets Held under Capital Leases
Property and equipment [Line Items]
Property and equipment, net	427
Other liabilities	103
Leasehold Improvements Paid by Others
Property and equipment [Line Items]
Property and equipment, net	$ 1,000