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Leases - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2023 | Jun. 30, 2024 | Sep. 30, 2022
Lessee Lease Description [Line Items] |  |  |
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 | $ 2,300 |  |
Operating lease liability | 11,631 |  |
Operating lease ROU asset | 11,217 |  | $ 11,258
Reduction in ROU asset | (2,700) |  |
Reduction in ROU operating lease liability | $ (2,700) |  |
Forecast |  |  |
Lessee Lease Description [Line Items] |  |  |
Operating lease liability |  | $ 7,100 |
Operating lease ROU asset |  | $ 7,100 |

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- Definition Lessee Payments for optional lease extension periods that have not yet been exercised but are reasonably likely to be exercised. + References No definition available. + Details
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- Definition Amount of increase (decrease) in obligation for operating lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (g)(1) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
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- Definition Indicates (true false) whether lessee has option to extend operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
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- Definition Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-1 + Details
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