Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Jun. 30, 2013		Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 876,983		$ 392,810
Certificates of deposit	5,908,248		7,088,000
Accounts receivable, net	5,801,140	[1]	4,577,932	[1]
Inventories, net	4,992,252		4,936,372
Deferred tax assets	433,191		416,191
Other current assets	268,131		422,332
Total current assets	18,279,945		17,833,637
Property, Plant and Equipment:
Land	923,587		923,587
Land improvements	314,563		314,563
Buildings and improvements	6,280,657		6,244,064
Production equipment and other	31,267,957		29,495,765
Property, Plant and Equipment Gross	38,786,764		36,977,979
Less accumulated depreciation	29,312,482		28,900,113
Net property, plant and equipment	9,474,282		8,077,866
Total assets	27,754,227		25,911,503
Current Liabilities:
Accounts payable	1,483,596		1,003,647
Accrued wages and salaries	755,449		409,695
Other accrued expenses	625,654		460,245
Unearned revenue and customer deposits	197,611		84,905
Total current liabilities	3,062,310		1,958,492
Deferred income taxes	889,275		952,275
Total liabilities	3,951,585		2,910,767
Shareholders' Equity:
Preferred stock	0	[2]	0	[2]
Common stock	1,138,096	[3]	1,138,096	[3]
Additional paid-in capital	447,134		447,134
Retained earnings	26,139,510		25,337,604
Less: Treasury stock	3,922,098	[4]	3,922,098	[4]
Total shareholders' equity	23,802,642		23,000,736
Total liabilities and shareholders' equity	$ 27,754,227		$ 25,911,503

[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.