Condensed Consolidated Balance Sheets (Current Period Unaudited) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 4,558,352	$ 5,718,504
Investment securities – available for sale, at fair value	39,047,820	37,156,381
Accrued interest receivable on investment securities	206,171	212,048
Advances, deposits and other current assets	686,518	675,186
Total current assets	44,498,861	43,762,119
Property and equipment (at cost, less accumulated depreciation of $1,520,690 and $1,264,190, respectively)	1,043,761	832,886
Other assets:
Total other assets	28,029,296	1,075,567
Total assets	73,571,918	45,670,572
Goodwill	1,976,101
Deposits, deferred fees and other assets	236,467	1,054,942
Current liabilities:
Accounts payable	4,435,600	1,452,436
Accrued liabilities	1,775,149	2,707,653
Notes payable – current portion	2,700,960	10,891
Deferred revenue – current portion	500,000	500,000
Total current liabilities	9,411,709	4,670,980
Earnout milestone liability	13,877,659
Common stock warrant liability	398,044	3,026
Notes payable, net of discounts	6,887,662	5,000,000
Deferred revenue	3,625,000	4,000,000
Other non-current liabilities	454,904	472,731
Total liabilities	34,654,978	14,146,737
Stockholders' equity:
Preferred stock, $0.01 par value: 100,000 shares authorized; no shares issued or outstanding at September 30, 2014 and December 31, 2013, respectively	0	0
Common stock, $0.01 par value; 75,000,000 shares authorized; 20,097,103 and 13,737,970 shares issued at September 30, 2014 and December 31, 2013, and 19,976,046 and 13,604,975 shares outstanding at September 30, 2014 and December 31, 2013, respectively	200,971	137,380
Additional paid-in capital	229,447,212	203,139,142
Accumulated other comprehensive loss	(26,072)	(44,166)
Accumulated deficit	(188,501,156)	(169,287,157)
Subtotal	41,120,955	33,945,199
Treasury stock, at cost (121,057 and 132,995 shares at September 30, 2014 and December 31, 2013, respectively)	(2,204,015)	(2,421,364)
Total stockholders' equity	38,916,940	31,523,835
Total liabilities and stockholders' equity	73,571,918	45,670,572
In Process Research and Development [Member]
Other assets:
Finite lived intangible assets, net	25,801,728
Patents [Member]
Other assets:
Finite lived intangible assets, net	$ 15,000	$ 20,625