Supplemental disclosure of cash flow information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Supplemental Disclosure Of Cash Flow Information [Line Items]
Interest paid in cash	$ 14,797	$ 10,248
Income taxes paid in cash	211,000	160,000
Non-cash transactions:
Dividends declared but not paid	1,305,367	1,298,148
Transfers from inventory to property, plant and equipment and construction in progress	346,024	189,924
Transfers from construction in progress to property, plant and equipment	297,723	644,224
Right-of-use assets obtained in exchange for new operating lease liabilities	0	1,852,608
Purchase of equipment through issuance of long-term debt	188,645	95,707
Redeemable preferred stock [Member]
Non-cash transactions:
Stock Issued	133,197	102,203
Conversion (on a one-to-one basis) of 6,585 and 11,522, respectively, shares of redeemable preferred stock to common stock	3,951	6,913
Issuance of shares, respectively, shares of common stock for services rendered	$ 9,295	$ 8,632
Conversion of Stock, Shares Converted	6,585	11,522
Common stock [Member]
Non-cash transactions:
Stock Issued	$ 521,016	$ 745,468
Issuance of shares, respectively, shares of common stock for services rendered	$ 72,597	$ 88,488