Condensed Consolidated Balance Sheets (Unaudited) - USD ($)		Sep. 30, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents		$ 759,138	$ 353,475
Certificates of deposit		7,312,000	8,059,000
Accounts receivable, net	[1]	5,871,092	5,323,519
Inventories, net		5,088,117	4,537,693
Prepaid income taxes			56,112
Other current assets		381,087	423,952
Total current assets		19,411,434	18,753,751
Property, Plant and Equipment:
Land		923,587	923,587
Land improvements		611,847	501,102
Buildings and improvements		8,010,023	7,333,942
Production equipment and other		34,410,155	34,447,193
Property, Plant and Equipment Gross		43,955,612	43,205,824
Less accumulated depreciation		31,356,355	30,755,266
Net property, plant and equipment		12,599,257	12,450,558
Total assets		32,010,691	31,204,309
Current Liabilities:
Accounts payable		1,165,125	703,467
Accrued wages and salaries		890,507	690,526
Other accrued expenses		472,912	604,174
Unearned revenue and customer deposits		240,851	286,133
Total current liabilities		2,769,395	2,284,300
Deferred income taxes		958,084	1,028,084
Total liabilities		3,727,479	3,312,384
Shareholders' Equity:
Preferred stock	[2]	0	0
Common stock	[3]	1,138,096	1,138,096
Additional paid-in capital		447,134	447,134
Retained earnings		30,620,080	30,228,793
Less: Treasury stock	[4]	3,922,098	3,922,098
Total shareholders' equity		28,283,212	27,891,925
Total liabilities and shareholders' equity		$ 32,010,691	$ 31,204,309

[1] Net of allowance of $150,000.

[2] No par value, 500,000 shares authorized, none outstanding.

[3] $1.00 par value, 4,000,000 shares authorized, 1,138,096 shares issued, 966,132 shares outstanding.

[4] At cost, 171,964 shares.