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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 6,000 $ 3,378
Prepaid expenses and other current assets 1,707 4,066
Total current assets 7,707 7,444
Property and equipment, net 5 9
Right-of-use lease asset 65 93
Non-current deposits 413 1,259
Total assets 8,190 8,805
Current liabilities:    
Accounts payable 4,741 3,543
Accrued and other current liabilities 2,445 4,618
Total current liabilities 7,186 8,161
Lease liability 5 37
Total liabilities 7,191 8,198
Stockholders' equity:    
Common stock, $0.001 par value; 100,000,000 shares authorized at June 30, 2024 and December 31, 2023; 1,805,204 shares issued and outstanding at June 30, 2024 and 1,058,892 shares issued and outstanding at December 31, 2023 2 1
Additional paid-in capital 436,397 429,796
Accumulated other comprehensive loss (915) (908)
Accumulated deficit (434,485) (428,282)
Total stockholders' equity 999 607
Total liabilities and stockholders' equity 8,190 8,805
6% Convertible Exchangeable Preferred Stock    
Stockholders' equity:    
Preferred stock, value 0 0
Series A Convertible Preferred Stock    
Stockholders' equity:    
Preferred stock, value 0 0
Series B Convertible Preferred Stock    
Stockholders' equity:    
Preferred stock, value $ 0 $ 0