Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets
Receivables, allowance for doubtful accounts	$ 166,298	$ 175,867
Common stock, par value	$ 1	$ 1
Common stock, authorized shares	20,000,000	20,000,000
Common stock, issued shares	10,325,602	10,305,156
Common stock, outstanding shares	10,325,602	10,305,156