v3.26.1
Condensed Consolidated Statements of Cash Flows (unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash flows from operating activities:    
Net (loss) income $ (1,351,543) $ 6,042
Adjustments to reconcile net (loss) income to net cash used in operating activities:    
Depreciation 583,224 621,765
Non-cash lease expense (1,630) 25,325
Gain on disposal of assets, net (16,568) (339,520)
Provision for credit losses (26,812) (58,798)
Changes in operating assets and liabilities:    
Accounts receivable (1,555,645) (1,687,147)
Contract assets 55,497 28,904
Inventories, net (166,048) 55,960
Other current assets 10,790 (27,966)
Accounts payable 986,244 (386,017)
Accrued wages and salaries 112,821 103,456
Other accrued liabilities (7,750) (28,195)
Unearned revenue and customer deposits (159,927) (86,119)
Other long-term liabilities (220,000) (220,049)
Net cash used in operating activities (1,757,347) (1,992,359)
Cash flows from investing activities:    
Capital expenditures (189,154) (93,703)
Proceeds from the sale of assets 28,000 687,905
Proceeds from short-term investments 0 247,276
Net cash (used in) provided by investing activities (161,154) 841,478
Cash flows from financing activities:    
Proceeds from debt 1,000,000 500,000
Cash dividends paid (28,984) (57,968)
Net cash provided by financing activities 971,016 442,032
Net decrease in cash and cash equivalents (947,485) (708,849)
Cash and cash equivalents at beginning of period 1,718,237 1,922,679
Cash and cash equivalents at end of period 770,752 1,213,830
Supplemental disclosure of cash flows information:    
Cash paid for interest 26,299 7,201
Cash paid for income taxes, net of refunds received $ 2,087 $ 21,855