Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2013 Common Stock Warrants (Member)	Jun. 30, 2014 EGEN, Inc. [Member]
Cash flows from operating activities:
Net loss	$ (12,096,123)	$ (230,090)
Non-cash items included in net loss:
Depreciation and amortization	174,750	153,750
Change in fair value of common stock warrant liability	15,587	(8,660,417)
Deferred revenue	(250,000)	(250,000)
Stock-based compensation	1,721,476	734,673
Treasury shares issued for services and 401(k) matching contributions	30,801	20,835
Change in deferred rent liability	(11,280)	(8,563)
Amortization of deferred finance charges and debt discount associated with notes payable	176,229	62,823
Loss on sale of investment securities	23,691	190,683
Cash received for non-refundable technology transfer fee		5,000,000
Net changes in:
Accrued interest on short term investments and other current assets	109,943	(166,666)
Accounts payable	1,932,916	(817,058)
Accrued liabilities	(834,533)	572,880
Net cash used in operating activities:	(9,006,543)	(3,397,150)
Cash flows from investing activities:
Purchases of investment securities	(22,491,879)	(39,995,066)
Proceeds from sale and maturity of investment securities	19,490,000	5,048,000
Cash used in acquisition of EGEN, Inc. (net of cash received)	(2,820,849)
Refund of deposit for letter of credit	50,000	50,000
Purchases of property and equipment	(119,745)	(57,494)
Net cash used in investing activities	(5,892,473)	(34,954,560)
Cash flows from financing activities:
Proceeds from sale of common stock equity, net of issuance costs	13,788,811	15,640,213
Proceeds from sale of preferred stock, net of issuance costs		13,616,442
Proceeds from exercise of common stock warrants			261,944
Proceeds from exercise of options to purchase common stock		181,337
Proceeds from note payable	5,000,000
Principal payments on notes payable	(10,891)	(319,188)
Net cash provided by financing activities	18,777,920	29,380,748
Increase (decrease) in cash and cash equivalents	3,878,904	(8,970,962)
Cash and cash equivalents at beginning of period	5,718,504	14,991,488
Cash and cash equivalents at end of period	9,597,408	6,020,526
Supplemental disclosures of cash flow information:
Interest paid	317,600	247,899
Fair value of common stock issued in acquisition of Egen, Inc. assets				$ 10,852,766