Consolidated Statements of Operations (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue
Product revenue	$ 40,504,929	$ 18,446,082	$ 20,791,874
Service revenue	21,806,224	6,658,816	3,615,253
Research and development contract revenue	1,918,731	1,496,530	1,701,330
Total revenue	64,229,884	26,601,428	26,108,457
Cost of product revenue	35,334,038	20,414,084	25,353,541
Cost of service revenue	30,556,292	14,928,595	12,304,158
Cost of research and development contract revenue	3,202,122	2,505,989	2,804,817
Research and development expense	6,468,470	3,121,007	5,434,235
Selling, general and administrative expenses	21,809,222	12,325,466	14,576,998
Legal reserve	2,400,000
Amortization of intangible assets	2,391,276	2,270,858	2,306,489
Operating loss	(37,931,536)	(28,964,571)	(36,671,781)
Interest and other income	751,963	150,006	226,120
Gain on bargain purchase	1,014,256
Change in fair value of common stock warrant liability	(52,259,898)	(37,101,818)	4,845,165
Interest and other expense	(387,288)	(398,275)	(261,958)
Gain on sale of equity interest in joint venture		3,234,717
Loss before income taxes	(88,812,503)	(63,079,941)	(31,862,454)
Income tax benefit	324,680	410,259
Net loss attributable to the Company	(88,487,823)	(62,669,682)	(31,862,454)
Preferred stock dividends declared	(155,877)	(121,118)
Net loss attributable to common shareholders	$ (88,643,700)	$ (62,790,800)	$ (31,862,454)
Loss per share:
Basic and diluted (in dollars per share)	$ (0.56)	$ (0.82)	$ (0.93)
Weighted average number of common shares outstanding (in shares)	159,228,815	76,436,408	34,376,427