Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 49,666,908	$ 63,189,307
Accounts receivable, other	227,620	520,812
Prepaid expenses and other current assets	502,103	226,064
Total current assets	50,396,631	63,936,183
Equipment, net	2,724,765	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	(5,025,735)	(4,770,516)
Total other intangible assets	5,924,265	6,179,484
Derivative asset, warrant (note 1)	28,320	50,300
Other assets		21,976
Total assets	61,788,981	75,738,650
Current liabilities:
Accounts payable and accrued liabilities	9,540,626	10,755,049
Deferred revenue, current	7,232,827	7,990,231
Derivative liabilities (note 1)	3,451,046	4,497,977
Total current liabilities	20,224,499	23,243,257
Deferred revenue, long-term	1,853,607	2,718,180
Total liabilities	22,078,106	25,961,437
Commitments and contingencies
Stockholders' equity:
Preferred Stock, $.001 par value; 5,000,000 shares authorized in 2013 and 2012; 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; 38,007,205 and 37,497,703 shares issued; 37,991,714 and 37,482,212 shares outstanding in 2013 and 2012, respectively	38,008	37,499
Additional paid-in capital	146,359,376	143,703,583
Treasury stock, at cost, 15,491 shares, 2013 and 2012	(47,183)	(47,183)
Accumulated deficit	(106,642,035)	(93,919,395)
Total stockholders' equity	39,710,875	49,777,213
Total liabilities and stockholders' equity	$ 61,788,981	$ 75,738,650