Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 1,524,167	$ 4,045,101
Certificates of deposit	1,694,000	2,691,000
Accounts receivable - Less allowances of $146,000 and $160,000, respectively	5,904,401	4,975,137
Inventories, net	9,423,243	9,121,230
Prepaid income taxes	985,119	509,119
Other current assets	421,999	422,747
Total current assets	19,952,929	21,764,334
Property, Plant and Equipment
Land and improvements	1,510,513	1,510,513
Buildings and improvements	6,758,266	6,758,266
Production equipment and other	37,778,206	37,080,762
Property, Plant and Equipment, Gross	46,046,985	45,349,541
Less accumulated depreciation	34,037,051	33,487,748
Net property, plant and equipment	12,009,934	11,861,793
Total assets	31,962,863	33,626,127
Current Liabilities
Accounts payable	1,234,323	697,235
Accrued wages and salaries	577,657	462,332
Other accrued expenses	84,244	327,961
Unearned revenue and customer deposits	535,498	203,717
Total current liabilities	2,431,722	1,691,245
Deferred income taxes	864,084	948,084
Total liabilities	3,295,806	2,639,329
Shareholders' Equity
Preferred stock, no par value, 500,000 shares authorized: none outstanding	0	0
Common stock, $1.00 par value, 4,000,000 shares authorized, 1,138,096 shares issued; 966,132 shares outstanding	1,138,096	1,138,096
Additional paid-in capital	447,134	447,134
Retained earnings	31,003,925	33,323,666
Treasury stock, 171,964 shares at cost	(3,922,098)	(3,922,098)
Total shareholders' equity	28,667,057	30,986,798
Total liabilities and shareholders' equity	$ 31,962,863	$ 33,626,127