CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net profit (loss)	$ (14,424,545)	$ 408,460	$ (4,800,308)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	95,517	107,666	475,316
Retirement of fixed assets	10,206	63,853	103,241
Fair value adjustment of warrant liability	(7,915,027)	(933,420)	(656,905)
Impairment loss on fixed assets	0	0	1,187,305
Non-realized foreign exchange loss	17,834	0	0
Gain on sale of affiliate's shares	0	(15,826,217)	(1,224,951)
Stock option and warrant expense	1,436,840	1,620,088	2,867,638
Common stock issued for services	0	44,450	43,000
Changes in assets and liabilities:
Accounts receivable	83,302	(119,326)	(12,400)
Interest receivable	76,349	13,155	(130,779)
Income taxes recoverable	519,158	0	303,535
Prepaid expenses and other current assets	277,232	(56,127)	(594,668)
Accounts payable	1,046,539	(38,131)	397,633
Deferred revenue	0	0	(9,400,397)
Accrued expenses and other current liabilities	2,105,212	171,459	(64,454)
Total adjustments	(2,246,838)	(14,952,550)	(7,313,956)
Net cash used in operating activities	(16,671,383)	(14,544,090)	(12,114,264)
Cash flows from investing activities:
Proceeds from matured marketable securities	25,644,481	26,250,000	(22,750,000)
Purchase of marketable securities	(23,134,292)	(24,067,861)
Proceeds from sale of fixed assets	0	0	119,929
Proceeds from sale of assets held for sale	0	73,634	0
Proceeds from sale of affiliate's shares	6,938,603	8,887,614	1,224,951
Purchases of equipment and furnishings	(52,868)	(315,751)	(195,449)
Net cash provided by (used in) investing activities	9,395,924	10,827,636	(21,600,569)
Cash flows from financing activities:
Common stock issued in accordance with financing	18,939,619	0	18,273,568
Net proceeds from exercise of stock options and warrants	0	147,294	293,083
Net cash provided by financing activities	18,939,619	147,294	18,566,651
Net increase (decrease) in cash and cash equivalents	11,664,160	(3,569,160)	(15,148,182)
Cash and cash equivalents at beginning of year	6,324,430	9,893,590	25,041,772
Cash and cash equivalents at end of year	17,988,590	6,324,430	9,893,590
Supplemental disclosures of non-cash financing activities:
Warrants issued in connection with financing	12,216,680	0	4,027,606
Warrants issued for prepaid services	$ 0	$ 0	$ 133,391