Supplemental disclosure of cash flow information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Supplemental disclosure of cash flow information
Interest paid in cash	$ 4,420	$ 8,479	$ 21,417
Income taxes paid in cash	2,367,076
Non-cash transactions:
Transfers from inventory to property, plant and equipment and construction in progress	758,688	538,777	317,853
Transfers from construction in progress to property, plant and equipment	5,883,845	1,395,485	7,093,158
Right-of-use assets obtained in exchange for new operating lease liabilities	412,308	1,604,702	745,078
Transfers from prepaid expenses to property, plant and equipment	509,133	67,136	271,922
Transfers from prepaids to inventory	0	0	238,032
Expenditures for property, plant and equipment and construction in progress not yet paid	595,288	0	0
Redeemable preferred stock
Non-cash transactions:
Dividends declared but not paid	$ 2,237,864	$ 1,747,938	$ 1,502,506