Statements of Income (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net sales	$ 13,825,764	$ 14,338,512
Costs and expenses:
Cost of sales	5,218,959	5,650,160
Operating expenses	2,508,334	2,552,790
Total costs and expenses	7,727,293	8,202,950
Income from operations	6,098,471	6,135,562
Other income (expense):
Investment income	325,017	332,652
(Loss) gain on sale of assets	(14,861)	18,251
Income from damage settlement	518,050	385,182
Total other income, net	828,206	736,085
Income from operations before income taxes	6,926,677	6,871,647
Provision for income taxes	2,095,897	2,155,117
Net income	$ 4,830,780	$ 4,716,530
Earnings per common share (basic and diluted) (in Dollars per share)	$ 1.05	$ 1.03
Weighted average shares (basic and diluted) (in Shares)	4,596,439	4,596,439