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CONDENSED BALANCE SHEETS (UNAUDITED) - USD ($)
Mar. 31, 2024
Dec. 31, 2023
Current assets:    
Cash and cash equivalents $ 2,901,000 $ 8,554,000
Investments 323,000  
Other current assets 989,000 1,280,000
Total current assets 4,213,000 9,834,000
Property and equipment, net 800,000 906,000
Operating lease right-use-of assets 171,000 202,000
Goodwill 372,000 372,000
Intangible assets, net 33,000 42,000
Other assets 32,000 32,000
Total assets 5,621,000 11,388,000
Current liabilities:    
Accounts payable and accrued expenses 6,447,000 6,631,000
Operating lease liability 115,000 120,000
Deferred grant liability 247,000  
Term loan obligation, current 3,590,000 3,976,000
Total current liabilities 10,399,000 10,727,000
Noncurrent operating lease liability 59,000 85,000
Deferred grant liability   1,924,000
Total liabilities 10,458,000 12,736,000
Commitments and contingencies (Note 8)
Stockholders' deficit:    
Preferred stock, $0.001 par value; 5,000,000 shares authorized; 1,952 shares issued and outstanding at March 31, 2024 and December 31, 2023, respectively
Common stock, $0.001 par value; 100,000,000 shares authorized; 4,522,656 and 4,264,231 issued and outstanding at March 31, 2024, and 4,522,656 issued and 4,444,097 outstanding as of December 31, 2023, respectively 5,000 5,000
Treasury stock (at cost, 258,425 and 78,559 shares as of March 31, 2024 and December 31, 2023, respectively) (500,000) (126,000)
Additional paid-in capital 479,420,000 479,274,000
Accumulated deficit (483,762,000) (480,501,000)
Total stockholders' deficit (4,837,000) (1,348,000)
Total liabilities and stockholders' deficit $ 5,621,000 $ 11,388,000