Condensed Consolidated Balance Sheets (Unaudited) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 1,084,363	$ 1,152,569
Certificates of deposit	6,814,000	7,810,000
Accounts receivable - Less allowances of $140,000	6,502,374	5,326,650
Inventories, net	5,254,333	4,528,100
Prepaid income taxes	148,686	84,112
Other current assets	399,682	357,918
Total current assets	20,203,438	19,259,349
Property, Plant and Equipment
Land and improvements	1,616,041	1,535,434
Buildings and improvements	8,039,831	8,039,831
Production equipment and other	35,510,017	34,607,507
Property, Plant and Equipment, Gross	45,165,889	44,182,772
Less accumulated depreciation	31,939,664	31,625,819
Net property, plant and equipment	13,226,225	12,556,953
Total assets	33,429,663	31,816,302
Current Liabilities:
Accounts payable	1,204,908	737,040
Accrued wages and salaries	895,390	674,316
Other accrued expenses	440,352	495,132
Unearned revenue and customer deposits	373,848	312,775
Total current liabilities	2,914,498	2,219,263
Deferred income taxes	855,084	737,084
Total liabilities	3,769,582	2,956,347
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	31,996,949	31,196,823
Treasury stock, 171,964 shares at cost	3,922,098	3,922,098
Total shareholders' equity	29,660,081	28,859,955
Total liabilities and shareholders' equity	$ 33,429,663	$ 31,816,302