CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowances on accounts receivable	$ 146,108	$ 276,302
Accumulated depreciation on Property and equipment	16,550,400	16,022,230
Redeemable convertible preferred stock, par value	$ 0.001	$ 0.001
Redeemable convertible preferred stock, shares authorized	2,000,000	2,000,000
Redeemable convertible preferred stock, shares issued	900,000	900,000
Redeemable convertible preferred stock, shares outstanding	900,000	900,000
Redeemable convertible preferred stock, redemption value	$ 9,000,000	$ 9,000,000
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	56,360,222	56,036,972
Common stock, shares outstanding	45,222,846	48,031,737
Common Stock held in treasury, shares	11,137,376	8,005,235