Condensed Consolidated Balances Parenthetical (USD $)	Jun. 30, 2011	Dec. 31, 2010
Allowance for doubtful accounts	$ 256,274	$ 213,108
Stockholders' equity
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	8,000,000	8,000,000
Common Stock, Shares, Issued	4,826,182
Common Stock, Shares, Outstanding	4,785,262
Treasury stock, at cost	40,920	40,920
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares outstanding	0	0