STATEMENTS OF CASH FLOWS - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 1,049,274	$ 774,133
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and accretion	203,944	230,689
Amortization of right of use asset	43,841	40,792
Amortization of patents	2,207	2,207
Stock based compensation	31,972	30,563
(Gain) loss on disposal of equipment	(5,166)	3,224
Deferred tax asset	132,100	131,002
Gain on extinguishment of debt		(325,300)
Inventory reserve	(16,855)	600
Changes in operating assets and liabilities:
Accounts receivable	(287,692)	(144,555)
Inventories	(2,527,575)	(3,066,009)
Prepaid expenses	632,305	(151,276)
Other assets	(2)	2,656
Accounts payable	180,425	286,866
Operating lease obligations	(47,736)	(43,565)
Accrued expenses and customer deposits	2,099,024	3,477,435
Net cash provided by operating activities	1,490,066	1,249,462
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds on sale of equipment	5,166	591
Purchases of property and equipment	(179,140)	(558,828)
Net cash used in investing activities	(173,974)	(558,237)
CASH FLOWS FROM FINANCING ACTIVITIES
Payment of cumulative dividends on preferred stock		(24,152)
Principal payments on finance lease obligations and notes payable	(47,824)	(87,422)
Net cash used in financing activities	(47,824)	(111,574)
NET INCREASE IN CASH	1,268,268	579,651
CASH - Beginning of period	4,140,942	2,917,551
CASH - End of period	5,409,210	3,497,202
Cash paid during the period for:
Interest	4,826	5,895
Income taxes	10,863	2,778
SUPPLEMENTAL DISCLOSURES OF NONCASH INVESTING AND FINANCING ACTIVITIES
Increase in asset retirement obligation	$ 3,450	$ 3,450