Condensed Consolidated Balance Sheets (Unaudited) (USD $)	Mar. 31, 2015		Dec. 31, 2014
Current Assets:
Cash and cash equivalents	$ 457,693		$ 231,252
Certificates of deposit	5,809,000		6,058,000
Accounts receivable, net	6,267,309	[1]	5,669,654	[1]
Inventories, net	5,035,548		5,162,474
Deferred tax assets	448,191		446,191
Prepaid income taxes	0		173,656
Other current assets	424,084		348,413
Total current assets	18,441,825		18,089,640
Property, Plant and Equipment:
Land	923,587		923,587
Land improvements	346,655		346,655
Buildings and improvements	6,498,846		6,494,896
Production equipment and other	33,579,689		33,190,789
Property, Plant and Equipment Gross	41,348,777		40,955,927
Less accumulated depreciation	30,370,831		30,077,932
Net property, plant and equipment	10,977,946		10,877,995
Total assets	29,419,771		28,967,635
Current Liabilities:
Accounts payable	1,282,362		923,819
Accrued wages and salaries	801,408		605,029
Other accrued expenses	278,049		520,723
Unearned revenue and customer deposits	184,718		69,866
Total current liabilities	2,546,537		2,119,437
Deferred income taxes	1,085,275		1,107,275
Total liabilities	3,631,812		3,226,712
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	28,124,827		28,077,791
Less: Treasury stock	3,922,098	[4]	3,922,098	[4]
Total shareholders' equity	25,787,959		25,740,923
Total liabilities and shareholders' equity	$ 29,419,771		$ 28,967,635

[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.