STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,491,977	$ 1,442,815
Adjustments to reconcile net income to net cash
Depreciation and accretion	305,480	325,793
Amortization of right of use asset	66,340	61,756
Amortization of patents	3,311	3,311
Stock based compensation	40,642	39,233
Loss (gain) on disposal of equipment	(5,959)	4,511
Deferred tax asset	288,000	316,185
Gain on extinguishment of debt		(325,300)
Inventory reserve	(15,925)	900
Changes in operating assets and liabilities:
Accounts receivable	(156,805)	(298,706)
Inventories	(363,445)	(802,569)
Prepaid expenses	586,565	31,810
Other assets		2,656
Accounts payable	256,365	165,371
Operating lease obligations	(72,184)	(65,915)
Accrued expenses and customer deposits	(384,601)	887,869
Net cash provided by operating activities	2,051,679	1,780,698
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on sale of equipment	5,166	18,091
Purchases of property and equipment	(511,399)	(615,088)
Net cash used in investing activities	(506,233)	(596,997)
CASH FLOWS FROM FINANCING ACTIVITIES
Principal payments on finance lease obligations and notes payable	(72,131)	(123,715)
Payment of cumulative dividends on preferred stock		(24,152)
Net cash used in financing activities	(72,131)	(147,867)
NET INCREASE IN CASH	1,473,315	1,035,834
CASH - Beginning of year	4,140,942	2,917,551
CASH - End of period	5,614,257	3,953,385
Cash paid during the period for:
Interest	6,846	9,256
Income taxes	17,986	22,097
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES
Increase in asset retirement obligation	$ 5,175	$ 5,175