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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)

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