Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 2,009,461	$ 1,986,531
Preferred stock, par value	$ 0.15	$ 0.15
Preferred stock, shares authorized	1,500,000	1,500,000
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	10,451,678	10,451,678
Common stock, shares outstanding	10,451,678	10,451,678