Contingent Liabilities (Details Narrative) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Sep. 30, 2012	Mar. 31, 2016	Mar. 31, 2015
Contingent Liabilities Details Narrative
Cap on environment financial responsibility	$ 1,871				$ 1,871
Environmental remediation expense				$ 1,771
Total cost of remediation	1,900				1,900
Environmental remediation recovery	$ 0	$ 3,000	$ 0		$ 3,000	$ 0