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Common Stock Issuances (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Subsidiary or Equity Method Investee [Line Items]      
Number of common shares issued 0 497,571  
Number of common shares issued 10,857,801 10,844,912 10,853,566
Gross proceeds associated with sale $ 0 $ 4,704