Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts for trade accounts receivable	$ 70,699	$ 59,781
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	47,166,666	47,166,666
Common stock, shares issued	29,178,271	29,178,271
Common stock, shares outstanding	29,178,271	29,178,271
Treasury shares	140,250	140,250