Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (78,292)	$ (1,022,117)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation	2,442,036	2,328,179
Amortization of intangible assets	19,104	19,104
Amortization and write-off of debt issuance costs	7,841	102,724
Forgiveness of debt		(937,700)
Deferred income taxes		(14,631)
Stock-based compensation	144,313	253,135
Loss on disposal of fixed assets	30,963	39,303
Non-cash rent expense	10,716	15,320
Changes in:
Trade accounts receivable	(897,428)	(159,636)
Accrued interest income	495	27,258
Inventory	(997,460)	425,742
Prepaid expenses and other current assets	26,064	(61,695)
Other assets	58	711
Accounts payable and accrued expenses	245,760	299,881
Net cash provided by operating activities	954,170	1,315,578
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(2,608,649)	(4,072,539)
Maturities of investment	996,000	3,449,000
Purchases of investments		(1,992,000)
Proceeds from sale of assets	15,290	45,600
Net cash used for investing activities	(1,597,359)	(2,569,939)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from public offering, net	4,233,026
Proceeds from debt issuance	400,000	11,537,700
Debt principal repayments	(768,271)	(9,573,568)
Payments of debt issuance costs	2,272	(53,136)
Proceeds from exercise of stock options	11,693	9
Net cash provided by financing activities	3,878,720	1,911,005
NET INCREASE IN CASH AND CASH EQUIVALENTS	3,235,531	656,644
BEGINNING CASH AND CASH EQUIVALENTS	6,949,937	6,293,293
ENDING CASH AND CASH EQUIVALENTS	10,185,468	6,949,937
CASH PAID FOR:
Income taxes	5,110	4,581
Interest expense	308,682	481,408
NON-CASH ACTIVITIES:
Forgiveness of debt		(937,700)
Change in capital expenditures included in accounts payable and accrued expenses	(18,263)	(170,220)
Net change in fair value of interest rate swaps, net of taxes		(43,895)
Surrender of shares to exercise stock options	$ 165,337	$ 39,366