Segment Reporting (Tables)

12 Months Ended

Sep. 30, 2019

Segment Reporting

Schedule of revenues from external customers attributable to geographic areas

	Year Ended September 30,
	2017		2018		2019
Net Revenue by Geography:
United States	$	235,500	$	258,275	$	300,728
Europe		98,096		113,967		119,246
China		18,997		24,640		24,329
Other		42,616		38,444		45,912
Net Revenues	$	395,209	$	435,326	$	490,215
Net Revenue by Product Group:
High-temperature resistant alloys	$	320,119	$	352,614	$	392,172
Corrosive-resistant alloys		75,090		82,712		98,043
Net revenues	$	395,209	$	435,326	$	490,215

Schedule of long-lived assets by geographic areas

	September 30,
	2018		2019
Long-lived Assets by Geography:
United States	$	172,689	$	163,158
Europe		6,522		6,661
China		189		147
Total long-lived assets	$	179,400	$	169,966