Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 1,058,199	$ 1,429,454
Certificates of deposit	6,076,000	6,574,000
Accounts receivable - Less allowances of $155,000 and $140,000, respectively	5,503,683	4,609,314
Inventories, net	5,178,381	4,951,177
Prepaid income taxes	20,186	58,186
Other current assets	465,417	427,192
Total current assets	18,301,866	18,049,323
Property, Plant and Equipment:
Land and improvements	1,636,749	1,636,749
Buildings and improvements	8,331,804	8,331,804
Production equipment and other	36,576,743	36,408,746
Property, Plant and Equipment, Gross	46,545,296	46,377,299
Less accumulated depreciation	33,040,602	32,703,246
Net property, plant and equipment	13,504,694	13,674,053
Total assets	31,806,560	31,723,376
Current Liabilities:
Accounts payable	929,638	490,580
Accrued wages and salaries	614,080	629,972
Other accrued expenses	233,406	349,069
Unearned revenue and customer deposits	108,306	152,644
Total current liabilities	1,885,430	1,622,265
Deferred income taxes	919,084	943,084
Total liabilities	2,804,514	2,565,349
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	31,338,914	31,494,895
Treasury stock, 171,964 shares at cost	(3,922,098)	(3,922,098)
Total shareholders' equity	29,002,046	29,158,027
Total liabilities and shareholders' equity	$ 31,806,560	$ 31,723,376