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Condensed Consolidated Balance Sheets - USD ($)
Sep. 30, 2023
Dec. 31, 2022
Current assets:    
Cash and cash equivalents $ 3,667,000 $ 56,409,000
Short-term investments 55,942,000 0
Prepaid expenses and other current assets 3,382,000 3,109,000
Total current assets 62,991,000 59,518,000
Operating lease asset, net 459,000 739,000
In-process research and development 32,386,000 32,386,000
Other assets 233,000 150,000
Total assets 96,069,000 92,793,000
Current liabilities:    
Accounts payable 465,000 2,200,000
Current operating lease liabilities 396,000 363,000
Accrued expenses and other liabilities 2,038,000 3,912,000
Total current liabilities 2,899,000 6,475,000
Deferred tax liabilities 1,752,000 1,752,000
Non-current operating lease liabilities 83,000 383,000
Total liabilities 4,734,000 8,610,000
Commitments and contingencies (Note 8)
Stockholders’ equity:    
Common stock, $0.001 par value, 200,000,000 shares authorized at September 30, 2023 and December 31, 2022; 23,545,130 and 13,776,788 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively 24,000 14,000
Additional paid-in capital 324,876,000 287,034,000
Accumulated deficit (233,565,000) (202,865,000)
Total stockholders’ equity 91,335,000 84,183,000
Total liabilities and stockholders’ equity 96,069,000 92,793,000
Series X1 Non-voting Convertible Preferred Stock [Member]    
Stockholders’ equity:    
Preferred stock, value
Series X Non-voting Convertible Preferred Stock [Member]    
Stockholders’ equity:    
Preferred stock, value