Consolidated Balance Sheets (Unaudited) (Parentheticals) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Allowance for doubtful accounts (in Dollars)	$ 62,000	$ 77,000	[1]
Common stock, par value (in Dollars per share)	$ 0.01	$ 0.01	[1]
Common stock, shares authorized	50,000,000	50,000,000	[1]
Common stock, shares issued	22,327,855	22,424,285	[1]
Common stock, shares outstanding	22,327,855	22,424,285	[1]

[1] The consolidated balance sheet as of December 31, 2010 has been prepared using information from the audited financial statements at that date.