Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Consolidated Balance Sheets [Abstract]
Receivables, allowance for doubtful accounts	$ 175,705	$ 300,000
Preferred stock, par value	$ 1.66	$ 1.66
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common stock, par value	$ 1.66	$ 1.66
Common stock, shares authorized	90,000,000	90,000,000
Common stock, shares issued	5,103,918	5,115,435
Common stock, shares outstanding	5,103,918	5,115,435