v3.25.2
Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Cash flows from operating activities:              
Net loss $ (2,666,000) $ (1,853,000) $ (3,530,000) $ (4,629,000) $ (4,519,000) $ (8,159,000)  
Adjustments to reconcile net loss to net cash used in operating activities:              
Non-cash lease expense         122,000 (3,000)  
Depreciation and amortization         24,000 55,000  
Stock-based compensation expense         119,000 484,000  
Change in fair value of warrant liabilities 624,000   (889,000)   (297,000) (1,140,000)  
Change in fair value of Convertible Notes     (170,000)  
Loss upon issuance of Convertible Notes carried at fair value     1,198,000  
Loss on impairment and disposal of property and equipment         1,000 25,000  
Changes in operating assets and liabilities:              
Accounts receivable         (288,000) 14,000  
Prepaid expenses and other assets         426,000 379,000  
Inventories         53,000 1,000  
Accounts payable         (430,000) 682,000  
Accrued liabilities         (616,000) (7,000)  
Other liabilities         (459,000) (503,000)  
Net cash used in operating activities         (4,836,000) (8,172,000)  
Cash flows from investing activities:              
Purchase of property and equipment         (35,000)  
Net cash used in investing activities         (35,000)  
Cash flows from financing activities:              
Principal repayment of DECD loan         (116,000) (17,000)  
Payment of stock issuance costs         (147,000)  
Proceeds from Convertible Notes         1,366,000  
Proceeds from Equity Line of Credit         25,000  
Net cash provided by financing activities         4,612,000 6,314,000  
Net decrease in cash, cash equivalents and restricted cash         (224,000) (1,893,000)  
Cash, cash equivalents and restricted cash, beginning of year   $ 1,769,000   $ 2,855,000 1,769,000 2,855,000 $ 2,855,000
Cash, cash equivalents and restricted cash, end of year $ 1,545,000   $ 962,000   1,545,000 962,000 $ 1,769,000
Supplemental disclosure of cash flow information:              
Cash paid for interest         17,000 6,000  
Supplemental disclosure of noncash investing and financing activities:              
Increase in right-of-use assets         169,000  
Fair value of warrants issued upon conversion of Convertible Notes         1,477,000  
Fair value of common stock issued upon conversion of Convertible Notes         916,000  
Equity Line of Credit Agreement [Member]              
Cash flows from financing activities:              
Proceeds from issuance of common stock         1,501,000  
2024 Direct Offering [Member]              
Cash flows from financing activities:              
Proceeds from issuance of common stock         5,563,000  
Payment of stock issuance costs         (733,000)  
2024 At The Market Offering Agreement [Member]              
Cash flows from financing activities:              
Proceeds from issuance of common stock         $ 3,484,000