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Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Current assets:    
Cash and cash equivalents $ 951,000 $ 2,496,000
Accounts receivable, net of allowance for doubtful accounts of $0 and $0 as of March 31, 2026 and December 31, 2025, respectively 20,000 20,000
Prepaid expenses 169,000 216,000
Total current assets 1,140,000 2,732,000
Property and equipment, net 16,000 16,000
Operating lease right-of-use asset, net 385,000 494,000
Other assets 171,000 171,000
Total assets 1,712,000 3,413,000
Current liabilities:    
Accounts payable 820,000 641,000
Accrued expenses and other current liabilities 1,546,000 1,349,000
Operating lease liability - current 412,000 442,000
Total current liabilities 2,778,000 2,432,000
Operating lease liability - noncurrent 0 86,000
Total liabilities 2,778,000 2,518,000
Commitments and Contingencies  
Stockholders’ equity (deficit):    
Preferred stock, $0.001 par value, 25,000,000 shares authorized and no shares issued and outstanding as of March 31, 2026 and December 31, 2025 0 0
Common stock, $0.001 par value, 50,000,000 shares authorized, 10,940,372 and 10,755,647 shares issued and outstanding as of March 31, 2026 and December 31, 2025, respectively 11,000 11,000
Additional paid-in capital 169,531,000 169,233,000
Accumulated deficit (170,608,000) (168,349,000)
Total stockholders’ equity (deficit) (1,066,000) 895,000
Total liabilities and stockholders’ equity (deficit) $ 1,712,000 $ 3,413,000