CONDENSED BALANCE SHEETS - USD ($)	Mar. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 3,382,915	$ 4,235,388
Accounts receivable, net	5,359,098	7,786,697
Investments in debt and equity securities, at fair value	32,322,786	40,328,308
Inventories	21,182,745	19,189,753
Income taxes receivable	694,904	978,851
Other current assets	719,928	753,062
Total current assets	63,662,376	73,272,059
Property, plant, and equipment, net	85,552,625	87,348,518
Other assets	92,448	103,625
Total assets	149,307,449	160,724,202
Current liabilities:
Accounts payable	4,723,664	4,290,588
Current portion of long-term debt	343,216	332,480
Accrued compensation	918,104	1,073,357
Dividends payable	1,417,437	1,417,437
Accrued royalties to shareholder	706,421	789,358
Other accrued liabilities	1,387,304	873,254
Income taxes payable	1,815	4,442
Total current liabilities	9,497,961	8,780,916
Other long-term liabilities	62,389,734	63,872,553
Long-term debt, net of current maturities	807,390	900,042
Total liabilities	72,695,085	73,553,511
Commitments and contingencies - see Note 10
Stockholders' equity:
Common Stock, no par value; authorized: 100,000,000 shares; 34,024,304 shares issued and 29,937,159 shares outstanding at December 31, 2024 and 2023
Additional paid-in capital	73,160,333	73,160,333
Retained earnings	16,110,264	26,668,591
Common stock in treasury - at cost (4,087,145 shares at December 31, 2024 and 2023)	(12,888,678)	(12,888,678)
Total stockholders' equity	76,612,364	87,170,691
Total liabilities and stockholders' equity	149,307,449	160,724,202
Series II Class B
Stockholders' equity:
Preferred stock, $1 par value: Class B; authorized: 5,000,000 shares	156,200	156,200
Series III Class B
Stockholders' equity:
Preferred stock, $1 par value: Class B; authorized: 5,000,000 shares	$ 74,245	$ 74,245