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Consolidated Balance Sheets - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Current assets:    
Cash and cash equivalents $ 13,353,543 $ 11,444,055
Investment securities - available for sale, at fair value 14,257,998 12,724,020
Accrued interest receivable on investment securities 68,309 54,440
Advances and deposits on clinical programs and other current assets 451,293 89,186
Total current assets 28,131,143 24,311,701
Property and equipment (at cost, less accumulated depreciation and amortization) 184,627 175,771
Other assets:    
In-process research and development, net 15,736,491 20,246,491
Goodwill 1,976,101 1,976,101
Other intangible assets, net 568,292 795,608
Deposits and other assets 258,933 8,761
Total other assets 18,539,817 23,026,961
Total assets 46,855,587 47,514,433
Current liabilities:    
Accounts payable - trade 3,020,638 3,416,863
Other accrued liabilities 2,585,898 2,282,827
Deferred revenue - current portion 500,000 500,000
Total current liabilities 6,106,536 6,199,690
Earn-out milestone liability 8,907,664 12,538,525
Note Payable, net of deferred financing costs 9,417,037
Deferred revenue - non-current portion 1,500,000 2,000,000
Other liabilities - non-current 63,278 71,710
Total liabilities 25,994,515 20,809,925
Commitments
Stockholders' equity:    
Preferred Stock - $0.01 par value (100,000 shares authorized, and no shares issued or outstanding at December 31, 2018 and 2017)
Common stock - $0.01 par value (112,500,000 shares authorized; 18,832,168 and 17,277,299 shares issued at December 31, 2018 and 2017, respectively, and 18,831,834 and 17,276,965 shares outstanding at December 31, 2018 and 2017, respectively) 188,322 172,772
Additional paid-in capital 294,393,313 288,408,976
Accumulated other comprehensive gain (loss) 29,872 (10,164)
Accumulated deficit (273,665,247) (261,781,888)
Total stockholders' equity before treasury stock 20,946,260 26,789,696
Treasury stock, at cost (334 shares at December 31, 2018 and 2017) (85,188) (85,188)
Total stockholders' equity 20,861,072 26,704,508
Total liabilities and stockholders' equity $ 46,855,587 $ 47,514,433