Unaudited Condensed Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities
Net loss	$ (387,496)	$ (411,356)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	200,422	175,398
Accretion of obligation for lease disposal costs	34,753	26,199
Equity based compensation	84,400	224,846
Gain on sale of property, plant, and equipment	(13,492)	0
Right-of-use asset amortization	(2,238)	(2,240)
Changes in operating assets and liabilities:
Accounts receivable	(333,311)	(306,950)
Inventories	(227,840)	(43,382)
Prepaids and other current assets	(363,258)	(802,199)
Accounts payable and accrued liabilities	(352,984)	(121,419)
Unearned revenues	(199,177)	(43,511)
Net cash provided by operating activities	288,597	1,000,448
Cash flows from investing activities:
Proceeds from sale of property, plant, and equipment	36,000	0
Purchase of property, plant and equipment	(214,936)	(66,522)
Net cash used in investing activities	(178,936)	(66,522)
Cash flows from financing activities:
Proceeds from sale of stock and exercise of options and warrants	4,865	4,880
Payments on financing lease	(1,523)	(4,040)
Principal payments on notes payable	(94,365)	(18,239)
Net cash used in financing activities	(91,023)	(17,399)
Net increase in cash, cash equivalents, and restricted cash	18,638	916,527
Cash, cash equivalents, and restricted cash at beginning of period	3,568,893	3,215,866
Cash, cash equivalents, and restricted cash at end of period	3,587,531	4,132,393
Supplemental disclosure of cash flow activities:
Cash paid for interest	155,681	157,826
Cash paid for income taxes	0	0
Supplemental disclosure of noncash financing and investing transactions
Decrease in accrued interest and increase in equity for conversion of dividends to stock	90,420	90,660
Cash and cash equivalents	2,191,108	3,274,125
Restricted cash included in long-term assets	1,396,423	858,268
Total cash, cash equivalents, and restricted cash shown in statement of cash flows	$ 3,587,531	$ 4,132,393