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Supplementary Balance Sheet Information (Tables) | 6 Months Ended
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Mar. 31, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Summary of inventories | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, |  | September 30,
​ |  | 2024 |  | 2023
​ |  | ​ |  |  |  |
Raw materials and purchased parts |  | $ | 57,101 |  | $ | 59,861
Work-in-process |  | ​ | 10,908 |  | ​ | 11,400
Finished goods |  | ​ | 54,342 |  | ​ | 56,937
Total inventories |  | $ | 122,351 |  | $ | 128,198
Summary of product warranty and retrofit activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Six Months Ended March 31,
​ | ​ | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Balance at beginning of period | ​ | $ | 10,223 | ​ | $ | 2,890
​ | Adjustment for acquisitions | ​ | ​ | — | ​ | ​ | 2,303
​ | Accruals for warranties during the period | ​ | ​ | 645 | ​ | ​ | 1,529
​ | Costs incurred during the period | ​ | ​ | (1,123) | ​ | ​ | (1,342)
​ | Balance at end of period | ​ | $ | 9,745 | ​ | $ | 5,380

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- Definition Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(a)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(b)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(6)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483489/210-10-50-1 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-8 + Details
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