Consolidated Statements of Cash Flows (USD $)	6 Months Ended		91 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013
Cash flows from operating activities:
Net income (loss)	$ (27,612,042)	$ 5,350,704	$ (70,765,175)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization expense	353,163	96,808	957,683
Non-cash derivatives (gain) loss	18,871,329	(10,567,444)	31,409,816
Non-cash interest expense			984,704
Non-cash loss from modification of warrants	764,769		764,769
Common stock issued to 401(k) plan	98,633	42,204	231,819
Common stock issued for services		24,750	234,201
Share-based compensation expense	1,627,191	767,955	4,660,502
Changes in operating assets and liabilities:
Restricted cash	(60)	(111,836)	(601,411)
Prepaid expenses	(76,795)	(358,806)	(231,341)
Other assets	2,280		(197,720)
Accounts payable	(277,858)	9,768	874,692
Accrued interest payable			(15,256)
Accrued expenses	(358,213)	(328,507)	663,062
Net cash used in operating activities	(6,607,603)	(5,074,404)	(31,029,655)
Cash flows from investing activities:
Purchases of property and equipment	(626,128)	(252,290)	(3,397,689)
Net cash used in investing activities	(626,128)	(252,290)	(3,397,689)
Cash flows from financing activities:
Proceeds from issuance of convertible notes payable			4,181,000
Proceeds from convertible bridge notes			500,000
Principal payments on capital lease obligation	(16,079)	(15,148)	(74,214)
Proceeds from loans payable, net	342,000	143,711	1,920,000
Proceeds from issuance of common stock and warrants	16,315,068	18,871,045	50,132,906
Net cash provided by financing activities	16,640,989	18,999,608	56,659,692
Increase in cash and cash equivalents	9,407,258	13,672,914	22,232,348
Cash and cash equivalents at beginning of period	12,825,090	4,363,712
Cash and cash equivalents at end of period	22,232,348	18,036,626	22,232,348
Supplemental disclosure of cash flow information and non-cash transactions:
Cash paid for interest	59,075	7,746	214,984
Conversion of convertible notes payable and accrued interest into common stock			4,672,484
Conversion of convertible bridge note payable and accrued interest into common stock			504,597
Asset acquired through capital lease obligation			93,540
Beneficial conversion feature on convertible and bridge notes payable			134,410
Fair value of warrants issued with bridge notes payable			178,726
Fair value of warrants issued in connection with loan agreement			41,967
Issuance of founders shares			248
Reclassification of derivative warrant liability to additional paid-in capital	$ 33,456,147	$ 1,377,904	$ 38,104,424