Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income (loss)	$ (14,673,569)	$ (12,305,764)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation	189,840	257,641
Unrealized loss on short-term investments		12,801
Noncash compensation	1,122,857	1,222,552
Change in value of warrant liability	652,111	(4,263,026)
Changes in operating assets and liabilities:
Accounts receivable	(1,155,910)	1,701,736
Other current assets	303,845	(494,131)
Other long-term assets	(16,801)	(2,592)
Accounts payable	(322,004)	(234,314)
Deferred revenue	(661,811)
Accrued expenses	437,647	1,935,580
Net cash used in operating activities	(14,123,795)	(12,169,517)
Cash flows from investing activities:
Purchase of short-term investments		(4,973,524)
Sale of short-term investments	2,256,834	1,347,181
Purchase of equipment	(85,800)	(116,355)
Net cash provided by (used in) investing activities	2,171,034	(3,742,698)
Cash flows from financing activities:
Noncontrolling interest capital contribution to Incuron, LLC		5,893,557
Exercise of options	12,392	1,425
Repayment of capital lease obligation	(40,568)	(20,221)
Net cash provided by (used in) financing activities	(28,176)	5,874,761
Effect of exchange rate change on cash and equivalents	(425,749)	394,545
Decrease in cash and cash equivalents	(12,406,686)	(9,642,909)
Cash and cash equivalents at beginning of period	25,652,083	22,872,589
Cash and cash equivalents at end of period	13,245,397	13,229,680
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	12,714	10,226
Supplemental schedule of noncash financing activities:
Equipment acquired through lease financing		$ 221,690