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Shareholders' Equity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Equity [Abstract]    
Stock issued during period under registered offering, shares 3,738  
Offering price per share $ 4.75  
Net proceeds from equity offering $ 16,356 $ 0