Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Condensed Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 1,408,043	$ 1,389,762
Preferred stock, par value	$ 0.15	$ 0.15
Preferred stock, shares authorized	15,000,000	15,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.15	$ 0.15
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	8,646,678	8,369,752
Common stock, shares outstanding	8,646,678	8,369,752