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Contingent Liabilities (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2016
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2017
Sep. 30, 2016
Sep. 30, 2015
Contingent Liabilities Details Narrative            
Cap on environment financial responsibility         $ 1,871  
Environmental remediation expense $ 0 $ 2,000   $ 0 (1,000) $ 0
Total cost of remediation         $ 1,833  
Environmental remediation recovery     $ 3,000