Business Acquisition (Details Textual) $ in Thousands		2 Months Ended	3 Months Ended		12 Months Ended
	Jul. 23, 2013 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2013 USD ($)	Sep. 30, 2015 USD ($) facility	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)
Business Acquisition [Line Items]
Selling, general and administrative expenses					$ 19,167	$ 15,084	$ 11,605
General Aluminum Forgings, LLC
Business Acquisition [Line Items]
Consideration transferred	$ 4,400
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred				$ 123
Net sales recorded from the date of acquisition		$ 1,100
Net operating loss from the date of acquisition		$ 216
CBlade S.p.A. Forging & Manufacturing
Business Acquisition [Line Items]
Selling, general and administrative expenses					$ 2,681	$ 564	$ 0
Consideration transferred			$ 16,994
Net sales recorded from the date of acquisition			6,000
Net operating loss from the date of acquisition			$ 209
Number of operated facilities | facility					2