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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash Flows From Operating Activities    
Net loss $ (1,610,240) $ (2,335,195)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock based compensation 55,968 426,283
Depreciation and amortization 441,672 425,281
Loss on sale of property & equipment 63,011
Change of right-of-use asset 97,524 119,428
Net change in fair value of marketable securities 15,548
Change in inventory reserve 26,644 113,252
Changes in operating assets and liabilities:    
Accounts receivable (198,829) (10,712)
Inventories 114,929 881,527
Prepaid expenses and other current assets 1,604 45,954
Accounts payable (709,519) (904,756)
Accrued liabilities 157,497 (377,715)
Operating lease liabilities (109,037) (126,069)
Contract liabilities (67,500) (22,746)
Net cash used in operating activities (1,736,276) (1,749,920)
Cash Flows From Investing Activities    
Security deposit 14,087 2,709
Realized gain on sale of marketable securities, available for sale (35,210)
Net sales of investment in marketable securities 3,500,000
Proceeds from sale of property & equipment 25,000
Purchase of property and equipment (828,861) (1,991,051)
Net cash (used in) provided by investing activities (789,774) 1,476,448
Cash Flows From Financing Activities    
Finance lease payments (54,806) (83,735)
Net cash used in financing activities (54,806) (83,735)
Net change in cash, cash equivalents and restricted cash (2,580,856) (357,207)
Cash, cash equivalents and restricted cash at beginning of the period 7,706,240 16,755,233
Cash, cash equivalents and restricted cash at end of the period 5,125,384 16,398,026
Supplemental Cash Flow Information    
Cash paid for income taxes
Cash paid for interest 76,426 51,978
Reconciliation to the Consolidated Balance Sheets    
Cash and cash equivalents 4,910,267 16,137,920
Restricted cash 215,117 260,107
Total cash, cash equivalents and restricted cash $ 5,125,384 $ 16,398,027

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