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Note 10 - Quarterly Financial Information (Unaudited) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015
Revenues	$ 4,602	$ 10,987	$ 25,842	$ 6,826
Net loss	$ (18,135)	$ (14,621)	$ 4,901	$ (15,164)
Basic net (loss) income per share (in dollars per share)	$ (0.25)	$ (0.20)	$ 0.07	$ (0.21)
Diluted net (loss) income per share (in dollars per share)	$ (0.25)	$ (0.20)	$ 0.06	$ (0.21)

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.