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Net Income (Loss) Per Share (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Net Income (Loss) Per Share [Abstract]        
Net income (loss) used for calculation of basic and diluted EPS $ (15,442,000) $ (3,928,000) $ 8,311,000 $ (19,295,000)
Weighted average shares outstanding, basic (in shares) 33,339,163 27,751,437 30,952,458 27,227,151
Net income (loss) per share, basic $ (0.46) $ (0.14) $ 0.27 $ (0.71)
Basic weighted average common shares outstanding (in shares) 33,339,163 27,751,437 30,952,458 27,227,151
Stock options and restricted stock units (in shares) 0 0 2,007,775 0
Weighted average shares outstanding, diluted 33,339,163 27,751,437 32,960,233 27,227,151
Diluted income (loss) per common share (in dollars per share) $ (0.46) $ (0.14) $ 0.25 $ (0.71)
Stock options excluded from diluted EPS (in shares) 1,916,156 2,264,749 911,304 2,274,734