v3.25.1
Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Cash flows from operating activities:      
Net loss $ (672,000) $ (1,136,000)  
Adjustments to reconcile net loss to net cash used in operating activities:      
Bad debt (recovery) expense (18,000) 0  
Non-cash lease expense from right-of-use asset 0 17,000  
Stock-based compensation 0 31,000  
Changes in operating assets and liabilities:      
Accounts receivable 91,000 409,000  
Inventory 0 112,000  
Prepaid expenses and other current assets (203,000) (178,000)  
Other assets 1,000 0  
Accounts payable (35,000) 140,000  
Accrued expenses and other current liabilities 151,000 31,000  
Deferred revenue 5,000 (39,000)  
Lease liabilities 0 (17,000)  
Net cash used in operating activities (680,000) (630,000)  
Cash flows from financing activities:      
Net cash provided by financing activities 31,000 0  
Decrease in cash (649,000) (630,000)  
Cash and cash equivalents at beginning of period 4,965,000 5,990,000 $ 5,990,000
Cash and cash equivalents at end of period 4,316,000 5,360,000 4,965,000
Reconciliation of cash and cash equivalents      
Cash 3,816,000 4,860,000  
Current certificates of deposit 500,000 500,000 500,000
Total cash and cash equivalents 4,316,000 5,360,000 $ 4,965,000
Cash paid during the period for interest 1,000 5,000  
Non-cash investing and financing activities:      
Preferred stock dividends 12,000 44,000  
Common Stock Warrants [Member]      
Cash flows from financing activities:      
Net proceeds from exercise of common stock warrants $ 31,000 $ 0