Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenue	$ 6,696,126	$ 5,260,057	$ 19,162,176	$ 18,026,619
Operating expenses:
Research and development	5,138,622	4,884,231	14,762,634	16,688,703
General and administrative	3,275,428	3,283,246	9,004,008	11,632,272
Depreciation and amortization	72,453	114,494	234,811	348,813
Total operating expenses	8,486,503	8,281,971	24,001,453	28,669,788
Loss from operations	(1,790,377)	(3,021,914)	(4,839,277)	(10,643,169)
Other income (expense):
Interest income	5,727	3,961	13,534	10,496
Interest expense	(112,529)	(9,932)	(226,910)	(40,540)
Realization of cumulative translation adjustment	1,227,656		1,227,656
Change in fair value of derivative instruments	508,971	2,898,869	341,118	6,075,555
Other income (expense)	(31,312)	95,520	22,122	50,892
Total other income (expense)	1,598,513	2,988,418	1,377,520	6,096,403
Net loss before provision for income taxes	(191,864)	(33,496)	(3,461,757)	(4,546,766)
Provision for income taxes	(22,072)		(188,610)
Net loss	$ (213,936)	$ (33,496)	$ (3,650,367)	$ (4,546,766)
Basic and diluted net loss per share	$ 0.00	$ 0.00	$ (0.08)	$ (0.10)
Weighted average shares used in calculation of basic and diluted net loss per share	48,345,984	48,194,035	48,314,058	47,041,027