Consolidated Balance Sheets (Parentheticals) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Preferred stock-share par value (in Dollars per share)	$ 0.0001	$ 0.0001
Preferred stock-shares authorized (in Shares)	50,000,000	50,000,000
Preferred stock-shares issued (in Shares)	0	0
Preferred stock-shares outstanding (in Shares)	0	0
Common stock-share par value (in Dollars per share)	$ 0.0001	$ 0.0001
Common stock-shares authorized (in Shares)	250,000,000	250,000,000
Common stock-shares issued (in Shares)	34,341,360	34,090,618
Common stock-shares outstanding (in Shares)	34,341,360	34,090,618
Treasury stock, shares (in Shares)	905,349	805,613