Consolidated Balance Sheets - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 2,624,162	$ 9,265,144
Investment securities – available for sale, at fair value	1,680,000	10,799,890
Accrued interest receivable on investment securities	4,008	26,729
Advances and deposits on clinical programs	89,186	89,186
Other current assets	115,222	100,367
Total current assets	4,512,578	20,281,316
Property and equipment (at cost, less accumulated depreciation and Amortization)	462,836	854,872
Other assets:
In-process research and development	22,766,491	24,210,514
Other intangible assets, net	1,022,924	1,591,214
Goodwill	1,976,101	1,976,101
Security deposit on letter of credit	100,000	100,000
Other assets	8,761	14,386
Total other assets	25,874,277	27,892,215
Total assets	30,849,691	49,028,403
Current liabilities:
Accounts payable - trade	2,878,978	2,830,227
Other accrued liabilities	2,483,756	1,919,769
Notes payable - current portion	2,560,553	4,073,716
Deferred revenue – current portion	500,000	500,000
Total current liabilities	8,423,287	9,323,712
Earn-out milestone liability	13,188,226	13,921,412
Note payable – non-current portion		2,350,018
Deferred revenue – non-current portion	2,500,000	3,000,000
Other liabilities – non-current	12,352	47,597
Total liabilities	24,123,865	28,642,739
Commitments and contingencies
Stockholders’ equity:
Preferred Stock - $0.01 par value (100,000 shares authorized and no shares issued or outstanding at December 31, 2016 and 2015, respectively)
Common stock - $0.01 par value (112,500,000 shares authorized; 31,226,336 and 23,395,211 shares issued at December 31, 2016 and 2015 and 31,221,657 and 23,319,287 shares outstanding at December 31, 2016 and 2015, respectively)	312,263	233,952
Additional paid-in capital	247,878,463	239,668,235
Accumulated other comprehensive loss		(3,858)
Accumulated deficit	(241,379,712)	(218,130,360)
Total stockholders’ equity before treasury stock	6,811,014	21,767,969
Treasury stock, at cost (4,679 and 75,924 shares at December 31, 2016 and 2015, respectively)	(85,188)	(1,382,305)
Total stockholders’ equity	6,725,826	20,385,664
Total liabilities and stockholders’ equity	$ 30,849,691	$ 49,028,403