Consolidated Balance Sheets (USD $)	Dec. 31, 2012		Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 392,810		$ 704,345
Certificates of deposit	7,088,000		5,880,000
Accounts receivable, net	4,577,932	[1]	4,398,426	[2]
Inventories, net	4,936,372		5,212,040
Deferred tax assets	416,191		420,191
Other current assets	422,332		347,737
Total current assets	17,833,637		16,962,739
Property, Plant and Equipment:
Land	923,587		923,587
Land improvements	314,563		314,563
Buildings and improvements	6,244,064		6,169,545
Production equipment and other	29,495,765		28,785,896
Property, Plant and Equipment Gross	36,977,979		36,193,591
Less accumulated depreciation	28,900,113		28,298,066
Net property, plant and equipment	8,077,866		7,895,525
Total assets	25,911,503		24,858,264
Current Liabilities:
Accounts payable	1,003,647		968,266
Accrued wages and salaries	409,695		374,964
Other accrued expenses	460,245		453,594
Unearned revenue and customer deposits	84,905		151,652
Total current liabilities	1,958,492		1,948,476
Deferred income taxes	952,275		785,275
Total liabilities	2,910,767		2,733,751
Shareholders' Equity:
Preferred stock		[3]		[3]
Common stock	1,138,096	[4]	1,138,096	[4]
Additional paid-in capital	447,134		447,134
Retained earnings	25,337,604		24,461,381
Treasury stock	(3,922,098)	[5]	(3,922,098)	[5]
Total shareholders' equity	23,000,736		22,124,513
Total liabilities and shareholders' equity	$ 25,911,503		$ 24,858,264

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

[2] Net of allowance of $140,000.

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

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

[5] At cost, 171,964 shares.