Condensed Consolidated Balance Sheets (USD $)	Dec. 31, 2011		Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 704,345		$ 725,524
Certificates of deposit	5,880,000		6,380,000
Accounts receivable, net	4,398,426	[1]	4,017,081	[2]
Inventories, net	5,212,040		4,310,154
Deferred tax assets	420,191		394,191
Other current assets	347,737		353,017
Total current assets	16,962,739		16,179,967
Net property, plant and equipment	7,895,525		7,478,878
Total assets	24,858,264		23,658,845
Current Liabilities:
Accounts payable	968,266		748,781
Accrued wages and salaries	374,964		405,604
Other accrued expenses	453,594		312,123
Unearned revenue and customer deposits	151,652		84,698
Total current liabilities	1,948,476		1,551,206
Deferred income taxes	785,275		745,275
Total liabilities	2,733,751		2,296,481
Commitments and contingencies (Note 8)
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	24,461,381		23,699,232
Treasury stock	(3,922,098)	[5]	(3,922,098)	[5]
Total shareholders' equity	22,124,513		21,362,364
Total liabilities and shareholders' equity	$ 24,858,264		$ 23,658,845

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

[2] Net of allowance of $135,000.

[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.