Consolidated Statements of Cash Flows (USD $)	9 Months Ended		94 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013
Cash flows from operating activities:
Net income (loss)	$ (33,048,642)	$ 13,379,619	$ (76,201,775)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization expense	545,146	218,579	1,149,666
Non-cash derivatives (gain) loss	18,871,329	(21,436,653)	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	124,286	60,906	257,472
Common stock issued for services		24,750	234,201
Share-based compensation expense	2,201,039	823,617	5,234,350
Changes in operating assets and liabilities:
Restricted cash	(90)	(86,867)	(601,441)
Prepaid expenses	26,118	(22,237)	(128,428)
Other assets	3,420		(196,580)
Accounts payable	(444,991)	574,072	707,559
Accrued interest payable			(14,359)
Accrued expenses	241,840	143,570	1,262,218
Net cash used in operating activities	(10,715,776)	(6,320,644)	(35,137,828)
Cash flows from investing activities:
Purchases of property and equipment	(650,913)	(1,709,496)	(3,422,474)
Net cash used in investing activities	(650,913)	(1,709,496)	(3,422,474)
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	(24,286)	(20,294)	(82,421)
Proceeds from issuance of note payable	149,768		149,768
Proceeds from loans payable, net	342,000	112,289	1,920,000
Proceeds from issuance of common stock and warrants	16,407,657	19,124,042	50,225,495
Net cash provided by financing activities	16,875,139	19,216,037	56,893,842
Increase in cash and cash equivalents	5,508,450	11,185,897	18,333,540
Cash and cash equivalents at beginning of period	12,825,090	4,363,712
Cash and cash equivalents at end of period	18,333,540	15,549,609	18,333,540
Supplemental disclosure of cash flow information and non-cash transactions:
Cash paid for interest	91,092	22,272	247,001
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	$ 3,235,722	$ 38,104,424