Revenues from Contracts with Customers (Tables)

12 Months Ended

Sep. 30, 2023

Revenues from Contracts with Customers

Schedule of disaggregation of revenue

	Year Ended
	September 30,
	2021		2022		2023
Net revenues (dollars in thousands)
Aerospace	$	128,072	$	230,001	$	290,391
Chemical processing		63,147		91,665		92,019
Industrial gas turbine		66,772		91,878		120,731
Other markets		58,090		53,706		60,287
Total product revenue		316,081		467,250		563,428
Other revenue		21,580		23,211		26,528
Net revenues	$	337,661	$	490,461	$	589,956