CONDENSED BALANCE SHEETS - USD ($)	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 10,011,162	$ 12,667,550
Accounts receivable, net	7,424,629	10,671,721
Investments in debt and equity securities, at fair value	36,630,439	34,621,213
Inventories	19,488,819	17,581,368
Income taxes receivable	1,155,077	1,155,077
Other current assets	1,004,218	952,668
Total current assets	75,714,344	77,649,597
Property, plant, and equipment, net	91,815,450	93,478,521
Deferred tax asset	8,308,139	8,392,030
Other assets	137,160	152,064
Total assets	175,975,093	179,672,212
Current liabilities:
Accounts payable	2,594,312	4,779,035
Current portion of long-term debt	311,060	303,991
Accrued compensation	722,458	865,105
Dividends payable	1,417,437	1,417,437
Accrued royalties to shareholder	649,388	1,376,555
Other accrued liabilities	1,177,631	630,571
Income taxes payable	1,655	4,802
Total current liabilities	6,873,941	9,377,496
Other long-term liabilities	68,288,918	69,773,538
Long-term debt, net of current maturities	1,152,802	1,233,519
Total liabilities	76,315,661	80,384,553
Commitments and contingencies - see Note 10
Stockholders' equity:
Common Stock, no par value
Additional paid-in capital	73,160,333	73,160,333
Retained earnings	39,157,332	38,785,559
Common stock in treasury - at cost	(12,888,678)	(12,888,678)
Total stockholders' equity	99,659,432	99,287,659
Total liabilities and stockholders' equity	175,975,093	179,672,212
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