Consolidated Balance Sheets (Parentheticals) - $ / shares shares in Thousands	Dec. 31, 2015	Dec. 31, 2014
Preferred stock, par value (in Dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	50,000	50,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in Dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	250,000	250,000
Common stock, shares issued	42,983	41,276
Treasury stock, shares outstanding	1,705	905