Note 2 - Summary of Significant Accounting Policies (Details) - Basic and Diluted Net Income per Share Computational Data - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Basic and Diluted Net Income per Share Computational Data [Abstract]
Net income (in Dollars)		$ (7,863)	$ 3,532	$ (5,839)	$ 3,243
Basic shares outstanding:
Common stock		41,015	38,452	40,713	37,764
Dilutive securities (1)	[1]		2,488		2,758
Total		41,015	40,940	40,713	40,522

[1] For the three and six months ended June 30, 2014, the Company's dilutive securities exclude options potentially exercisable in the future into 97,000 shares and 69,000 shares, respectively, because their inclusion would have been anti-dilutive.