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Consolidated Balance Sheets - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Current assets:    
Cash and cash equivalents $ 6,875,273 $ 13,353,543
Investment in debt securities - available for sale, at fair value 7,985,886 14,257,998
Accrued interest receivable on investment securities 21,369 68,309
Advances and deposits on clinical programs and other current assets 1,352,670 451,293
Total current assets 16,235,198 28,131,143
Property and equipment (at cost, less accumulated depreciation and amortization) 405,363 184,627
Other assets:    
Deferred income tax asset 1,819,324
In-process research and development, net 15,736,491 15,736,491
Goodwill 1,976,101 1,976,101
Operating lease right-of-use assets, net 1,431,640
Other intangible assets, net 340,976 568,292
Deposits and other assets 333,274 258,933
Total other assets 21,637,806 18,539,817
Total assets 38,278,367 46,855,587
Current liabilities:    
Accounts payable - trade 2,862,949 3,020,638
Other accrued liabilities 2,303,547 2,585,898
Notes payable - current portion, net of deferred financing costs 1,840,228
Operating lease liability - current portion 387,733
Deferred revenue - current portion 500,000 500,000
Total current liabilities 7,894,457 6,106,536
Earn-out milestone liability 5,717,709 8,907,664
Note Payable, net of deferred financing costs 7,963,449 9,417,037
Operating lease liability - non-current portion 1,143,717
Deferred revenue - non-current portion 1,000,000 1,500,000
Other liabilities - non-current 63,278
Total liabilities 23,719,332 25,994,515
Commitments and contingencies
Stockholders' equity:    
Preferred Stock - $0.01 par value (100,000 shares authorized, and no shares issued or outstanding at December 31, 2019 and 2018)
Common stock - $0.01 par value (112,500,000 shares authorized; 23,256,152 and 18,832,168 shares issued at December 31, 2019 and 2018, respectively, and 23,255,818 and 18,831,834 shares outstanding at December 31, 2019 and 2018, respectively) 232,562 188,322
Additional paid-in capital 304,885,663 294,393,313
Accumulated other comprehensive gain 42,778 29,872
Accumulated deficit (290,516,780) (273,665,247)
Total stockholders' equity before treasury stock 14,644,223 20,946,260
Treasury stock, at cost (334 shares at December 31, 2019 and 2018) (85,188) (85,188)
Total stockholders' equity 14,559,035 20,861,072
Total liabilities and stockholders' equity $ 38,278,367 $ 46,855,587