BALANCE SHEETS - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 12,667,550	$ 19,721,345
Accounts receivable, net	10,671,721	4,835,119
Receivable from Technology Investment Agreement (TIA)		2,025,413
Investments in debt and equity securities, at fair value	34,621,213	29,657,314
Inventories	17,581,368	20,684,168
Income taxes receivable	1,155,077	10,619,835
Other current assets	952,668	1,266,516
Total current assets	77,649,597	88,809,710
Property, plant, and equipment, net	93,478,521	100,152,768
Deferred tax asset	8,392,030	6,518,663
Other assets	152,064	184,524
Total assets	179,672,212	195,665,665
Current liabilities:
Accounts payable	4,779,035	6,404,925
Current portion of long-term debt	303,991	285,954
Accrued compensation	865,105	997,530
Dividends payable	1,417,437	1,417,937
Accrued royalties to shareholder	1,376,555	973,701
Other accrued liabilities	630,571	1,992,144
Income taxes payable	4,802	63,631
Total current liabilities	9,377,496	12,135,822
Other long-term liabilities	69,773,538	75,459,612
Long-term debt, net of current maturities	1,233,519	1,533,422
Total liabilities	80,384,553	89,128,856
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, 2023 and 2022
Additional paid-in capital	73,160,333	73,164,501
Retained earnings	38,785,559	46,028,541
Common stock in treasury - at cost (4,087,145 shares at December 31, 2023 and 2022)	(12,888,678)	(12,888,678)
Total stockholders' equity	99,287,659	106,536,809
Total liabilities and stockholders' equity	179,672,212	195,665,665
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	$ 76,245