Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating activities:
Net loss	$ (44,624,098)	$ (6,944,030)
Adjustments to reconcile net loss to net cash flows from operating activities:
Depreciation and amortization	956,008	1,120,741
Accretion of discount	82,198
Derivative (gain) loss	(499,671)	8,871,050
Purchase of Arcion license with common stock	2,072,136
Stock-based compensation expense	2,487,730	1,088,769
Issuance of common stock		285,201
Changes in assets and liabilities:
Accounts receivable	(364,636)	76,829
Prepaid expenses and other assets	(131,660)	2,398
Accounts payable and accrued expenses	299,974	2,327,264
Income tax payable	85,000
Deferred revenue	(5,303,516)	12,822,417
Net cash flows (used in) provided by operating activities	(44,940,535)	19,650,639
Investing activities:
Purchase of equipment	(5,521)	(32,283)
Purchase of intangible assets		(1,050,000)
Net cash flows from investing activities	(5,521)	(1,082,283)
Financing activities:
Proceeds from exercise of stock options	347,434	1,873,397
Proceeds from exercise of warrants		135,000
Proceeds from notes payable and warrants	20,000,000
Deferred financing fees	(224,917)
Change in amounts due to related parties	(69,706)	(7,805)
Net cash flows from financing activities	20,052,811	2,000,592
Net change in cash and cash equivalents	(24,893,245)	20,568,948
Cash and cash equivalents at beginning of period	63,189,307	10,750,205
Cash and cash equivalents at end of period	$ 38,296,062	$ 31,319,153