Balance Sheets (USD $)	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 1,090,974	$ 1,514,589
Marketable securities	9,295,755	8,314,403
Accounts receivable, net of allowance for doubtful accounts of $18,000 in 2011 and $23,000 in 2010	1,653,440	1,090,711
Inventories (net)	1,467,434	1,321,389
Prepaid expenses and other current assets	163,034	148,240
Prepaid income taxes	78,613	182,575
Deferred income taxes	223,546	218,328
Total current assets	13,972,796	12,790,235
Property, plant, and equipment:
Land	69,000	69,000
Factory equipment and fixtures	3,694,379	3,650,283
Building and improvements	2,714,780	2,618,253
Waste disposal plant	133,532	133,532
Total property, plant and equipment	6,611,691	6,471,068
Less accumulated depreciation	5,366,204	5,261,908
Net property, plant, and equipment	1,245,487	1,209,160
Other asset	37,672	75,344
Total assets	15,255,955	14,074,739
Current liabilities:
Accounts payable	400,389	208,244
Accrued expenses	676,959	815,996
Total current liabilities	1,077,348	1,024,240
Deferred income taxes	64,578	3,626
Stockholders’ equity:
Common stock, $.10 par value; 10,000,000 shares authorized; 4,596,439 shares issued and outstanding at December 31, 2011 and 2010, Respectively	459,644	459,644
Accumulated other comprehensive income	34,612	6,835
Retained earnings	13,619,773	12,580,394
Total stockholders’ equity	14,114,029	13,046,873
Total liabilities and stockholders’ equity	$ 15,255,955	$ 14,074,739