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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

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