Leases - Additional Information (Details) $ in Millions	12 Months Ended
	Sep. 30, 2024 USD ($)
Lessee Disclosure [Abstract]
Operating lease, existence of option to extend	true
Operating lease, option to extend lease terms, description	Operating lease payments include $2.3 million related to options to extend lease terms that are reasonably certain of being exercised. During 2023, we reassessed the options to extend the term of the lease on our manufacturing facility in Carlisle, Pennsylvania, and determined it was not reasonably certain that Amtech would exercise those options. As a result, we reduced our ROU Asset and the related ROU Operating Lease liability by $2.7 million.
Payments related to options to extend lease terms	$ 2.3
Reduction in ROU asset	(2.7)
Reduction in ROU operating lease liability	$ (2.7)