Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 37,430,878	$ 63,189,307
Accounts receivable, other	509,016	520,812
Prepaid expenses and other current assets	269,712	226,064
Total current assets	38,209,606	63,936,183
Equipment, net	2,649,404	2,835,707
Goodwill	2,715,000	2,715,000
Other intangible assets:
Licenses	1,900,000	1,900,000
Acquired product rights	9,050,000	9,050,000
Accumulated amortization	(5,268,324)	(4,770,516)
Total other intangible assets	5,681,676	6,179,484
Derivative asset, warrant (note 1)		50,300
Other assets		21,976
Total assets	49,255,686	75,738,650
Current liabilities:
Accounts payable and accrued liabilities	11,961,869	10,755,049
Deferred revenue, current	5,613,843	7,990,231
Derivative liabilities (note 1)	3,030,140	4,497,977
Total current liabilities	20,605,852	23,243,257
Deferred revenue, long-term	1,563,642	2,718,180
Total liabilities	22,169,494	25,961,437
Commitments and contingencies
Stockholders' equity:
Preferred Stock, $.001 par value; 5,000,000 shares authorized; 2,709,300 shares of Series A Non-Voting Convertible Preferred Stock outstanding in 2013 and 2012.	2,709	2,709
Common Stock, $.001 par value; 75,000,000 shares authorized; 38,015,518 and 37,497,703 shares issued; 38,000,027 and 37,482,212 shares outstanding in 2013 and 2012, respectively	38,016	37,499
Additional paid-in capital	147,149,696	143,703,583
Treasury stock, at cost, 15,491 shares, 2013 and 2012	(47,183)	(47,183)
Accumulated deficit	(120,057,046)	(93,919,395)
Total stockholders' equity	27,086,192	49,777,213
Total liabilities and stockholders' equity	$ 49,255,686	$ 75,738,650