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Consolidated Balance Sheets - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Current assets:    
Cash and cash equivalents $ 7,544,728 $ 36,278,519
Short-term investments 115,593,750 80,164,823
Lease payments receivable – short term 77,815 73,091
Prepaid expenses 2,249,199 423,863
Total current assets 125,465,492 116,940,296
Fixed assets, net of accumulated depreciation 2,081 5,010
Other assets 25,000 25,000
Lease payments receivable – long term 106,868 165,834
Total assets 125,599,441 117,136,140
Current liabilities:    
Accounts payable 728,633 522,663
Accrued expenses 2,660,824 824,936
Note payable   110,247
Total current liabilities 3,389,457 1,457,846
Stockholders’ Equity:    
Preferred stock value
Common stock, $0.001 par value, 50,000,000 shares authorized, 16,189,258 and 14,457,013 shares issued and outstanding, respectively 16,189 14,457
Additional paid-in capital 280,746,968 235,522,746
Accumulated deficit (158,553,173) (119,858,909)
Total stockholders’ equity 122,209,984 115,678,294
Total liabilities and stockholders’ equity 125,599,441 117,136,140
Class A Convertible Preferred Stock    
Stockholders’ Equity:    
Preferred stock value