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Commitments and Related Party Transactions (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2015
Operating Leased Assets [Line Items]    
Corporate headquarters, periodic monthly rental expenses   $ 5
Corporate headquarters, lease expiration date   Oct. 31, 2017
K2 Investment Fund LLC [Member] | Aircraft [Member]    
Operating Leased Assets [Line Items]    
Rental fees incurred for use of plane $ 88 $ 391
Rate of aircraft lease (in dollars per flight hour)   $ 8
Term of notice for cancellation of lease   30 days