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Commitments (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2015
Sep. 30, 2014
Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]        
Purchase obligation   $ 6,879    
Operating leases rent expense $ 68 514 $ 277 $ 314
Future minimum lease payments   $ 2,488