Property and Equipment - Property and Equipment (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property And Equipment - Property And Equipment Details
Computer equipment	$ 897	$ 567
Laboratory and scientific equipment	1,300	791
Furniture and fixtures	206	37
Manufacturing equipment	89
Leasehold improvements	620	279
Capital lease-leasehold improvements	266
Capital projects in progress	55
Total property and equipment	3,433	1,674
Accumulated amortization - capital lease	(100)
Accumulated depreciation - other	(1,063)	(627)
Net property and equipment	$ 2,270	$ 1,047