Deferred Revenue (Details) - Conversion Services Agreement $ in Thousands, lb in Millions		9 Months Ended
	Nov. 17, 2006 USD ($)	Jun. 30, 2020 USD ($) lb
Deferred revenue
Term of agreement to provide conversion services	20 years
Up-front/advance payment received	$ 50,000
Additional volume of titanium metal to be converted on exercise of option by service receiver (in pounds) | lb		10
Liquidated damages		$ 25,000
Revenue recognition period		20 years
Maximum
Deferred revenue
Annual volume of titanium metal to be converted (in pounds) | lb		10
Amount of loan offered by counterparty		$ 12,000