Deferred Revenue (Details) - Conversion Services Arrangement $ in Thousands, lb in Millions		12 Months Ended
	Nov. 17, 2006 USD ($) lb	Sep. 30, 2015 USD ($) lb
Deferred revenue
Term of agreement to provide conversion services	20 years
Up-front fees received	$ 50,000
Additional volume of titanium metal to be converted on exercise of option by service receiver (in pounds) | lb		10
Revenue recognition period		20 years
Liquidated damages		$ 25,000
Maximum
Deferred revenue
Annual volume of titanium metal to be converted (in pounds) | lb	10
Amount of loan offered by counterparty		$ 12,000