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Warranty and Retrofit Costs | 9 Months Ended
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Jun. 30, 2023
Product Warranties Disclosures [Abstract] |
Warranty and Retrofit Costs | 10. Warranty and Retrofit Costs The following is a summary of product warranty and retrofit activity for the three and nine months ended June 30, 2023 and 2022 (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Three Months Ended June 30, | ​ | Nine Months Ended June 30,
​ | ​ | ​ | 2023 | ​ | 2022 | ​ | 2023 | ​ | 2022
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Balance at Beginning of Period | ​ | $ | 5,380 | ​ | $ | 2,491 | ​ | $ | 2,890 | ​ | $ | 2,330
​ | Adjustment for Acquisitions | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,303 | ​ | ​ | —
​ | Accruals | ​ | ​ | 2,407 | ​ | ​ | 663 | ​ | ​ | 3,936 | ​ | ​ | 1,875
​ | Cost Incurred | ​ | ​ | (1,529) | ​ | ​ | (630) | ​ | ​ | (2,871) | ​ | ​ | (1,681)
​ | Balance at End of Period | ​ | $ | 6,258 | ​ | $ | 2,524 | ​ | $ | 6,258 | ​ | $ | 2,524

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- Definition The entire disclosure for standard and extended product warranties and other product guarantee contracts, including a tabular reconciliation of the changes in the guarantor's aggregate product warranty liability for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(5) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-4 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-4 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-4 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-4 + Details
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