Joint Ventures	9 Months Ended
Jun. 27, 2026
Equity Method Investments and Joint Ventures [Abstract]
Joint Ventures	11. Equity Investment in Affiliates The Company made investments in the below entities and utilized the equity method of accounting to record its interest in them as it did not have control to direct the activities that most significantly impact their financial performance based on the shared powers of the venture partners. The carrying amount of the equity method investments is adjusted for any contribution that the Company makes to them as well as for the Company’s proportionate share of net earnings or losses and any dividends received. Micro Bird Holdings, Inc. As discussed in further detail in Note 13, Micro Bird Acquisition, the Company completed its acquisition of the remaining 50% of the outstanding voting common stock of Micro Bird on April 1, 2026, which previously represented an unconsolidated Canadian joint venture. Micro Bird produces Type A school buses in Drummondville, Quebec, and since September 2025, Micro Bird has been producing small and mid-sized commercial buses and a small number of Type A school buses at a newly opened facility in Plattsburgh, New York. Prior to the acquisition, in recognizing the Company’s 50% portion of Micro Bird's net income or loss, the Company recorded equity in net (loss) income of non-consolidated affiliates on the Condensed Consolidated Statements of Operations totaling approximately $(1.6) million and zero for the three months ended June 27, 2026 and June 28, 2025, respectively, and $2.4 million and $4.1 million for the nine months ended June 27, 2026 and June 28, 2025, respectively. The amount recorded in net (loss) income of non-consolidated affiliates during the three months ended June 27, 2026 represents a true-up of Micro Bird's year-to-date net income for the six-month period ended March 31, 2026 as the Company has historically accounted for its equity method investment in Micro Bird on a one month lag. Micro Bird paid no dividends in the three or nine months ended June 27, 2026 or June 28, 2025. The acquisition of the remaining 50% of the outstanding voting common stock of Micro Bird resulted in the Company controlling it at the beginning of the third quarter of fiscal 2026 and subsequently. Accordingly, the Company ceased accounting for its original 50% investment in Micro Bird utilizing the equity method as of March 28, 2026. In recording the investment in Micro Bird as a wholly-owned subsidiary as of April 1, 2026 to comply with the provisions of ASC 805, Business Combinations, the Company reversed the entire $37.6 million balance included within equity investment in affiliates on the Condensed Consolidated Balance Sheets, as well as a corresponding $2.0 million deferred tax liability balance, so that their carrying values were zero at June 27, 2026. The carrying value of the Company's investment in Micro Bird included within equity investment in affiliates on the Condensed Consolidated Balance Sheets was $35.2 million at September 27, 2025. Clean Bus Solutions, LLC The Company holds a 50% equity interest in Clean Bus Solutions, LLC ("CBS"), our unconsolidated joint venture that provided a fleet-as-a-service ("FaaS") offering using electric school buses manufactured and sold by the Company. The service was offered to qualified customers of the Company by providing them with turnkey electrification solutions, including a wide product range consisting of, among others, electric school buses, financing of electric buses and supporting charging infrastructure, project planning and management, and fleet optimization. In the fourth quarter of fiscal 2025, the Company performed an impairment assessment of its equity investment in CBS. Based upon the historical losses generated by CBS since inception, when coupled with CBS' projections of continued losses in future periods, management determined that the Company would not recover the carrying amount of its investment in the near term. Accordingly, a conclusion was reached that an impairment that was other-than-temporary in nature existed. During the fourth quarter of fiscal 2025, the Company recorded a non-cash impairment charge of $7.4 million that reduced the carrying value of the Company's investment in CBS to $0 at September 27, 2025. Through the course of its operations, CBS was unable to generate business on a timeline that was likely to generate profitable returns for the entity within the expectations of the Company and the other joint venture partner, Generate Capital, PBC (“Generate Capital”). In October 2025, the CBS Board of Managers met and voted to recommend to the joint venture partners to terminate the business, wind down operations, and dissolve the legal entity. On October 22, 2025, the Company's Board of Directors approved the termination of CBS and the joint venture agreement governing its operations. Upon obtaining similar approval from Generate Capital, the CBS Board of Managers authorized winding down and dissolution of the business on October 24, 2025, which was largely completed by the end of 2025. The Company made (i) no cash contributions to CBS during the three months ended June 27, 2026, (ii) $0.4 million of cash contributions to CBS during the three months ended June 28, 2025 and (iii) $0.2 million and $0.9 million of cash contributions to CBS during the nine months ended June 27, 2026 and June 28, 2025, respectively, which increased the balance of equity investment in affiliates on the Condensed Consolidated Balance Sheets. The cash contributions during the nine months ended June 27, 2026 were made to allow CBS to pay its obligations in connection with winding down its operations, terminating its business and dissolving the entity. In recognizing the Company’s 50% portion of CBS' net income or loss, the Company recorded zero and $(0.4) million in equity in net (loss) income of non-consolidated affiliates on the Condensed Consolidated Statements of Operations for the three months ended June 27, 2026 and June 28, 2025, respectively, and $(0.2) million and $(1.1) million for the nine months ended June 27, 2026 and June 28, 2025, respectively. CBS paid no dividends in any period. At both June 27, 2026 and September 27, 2025, the carrying value of the Company's investment in CBS included within equity investment in affiliates on the Condensed Consolidated Balance Sheets was approximately $0.

The Company made investments in the below entities and utilized the equity method of accounting to record its interest in them as it did not have control to direct the activities that most significantly impact their financial performance based on the shared powers of the venture partners. The carrying amount of the equity method investments is adjusted for any contribution that the Company makes to them as well as for the Company’s proportionate share of net earnings or losses and any dividends received.

As discussed in further detail in Note 13, Micro Bird Acquisition, the Company completed its acquisition of the remaining 50% of the outstanding voting common stock of Micro Bird on April 1, 2026, which previously represented an unconsolidated Canadian joint venture. Micro Bird produces Type A school buses in Drummondville, Quebec, and since September 2025, Micro Bird has been producing small and mid-sized commercial buses and a small number of Type A school buses at a newly opened facility in Plattsburgh, New York.

Prior to the acquisition, in recognizing the Company’s 50% portion of Micro Bird's net income or loss, the Company recorded equity in net (loss) income of non-consolidated affiliates on the Condensed Consolidated Statements of Operations totaling approximately $(1.6) million and zero for the three months ended June 27, 2026 and June 28, 2025, respectively, and $2.4 million and $4.1 million for the nine months ended June 27, 2026 and June 28, 2025, respectively. The amount recorded in net (loss) income of non-consolidated affiliates during the three months ended June 27, 2026 represents a true-up of Micro Bird's year-to-date net income for the six-month period ended March 31, 2026 as the Company has historically accounted for its equity method investment in Micro Bird on a one month lag. Micro Bird paid no dividends in the three or nine months ended June 27, 2026 or June 28, 2025.

The acquisition of the remaining 50% of the outstanding voting common stock of Micro Bird resulted in the Company controlling it at the beginning of the third quarter of fiscal 2026 and subsequently. Accordingly, the Company ceased accounting for its original 50% investment in Micro Bird utilizing the equity method as of March 28, 2026. In recording the investment in Micro Bird as a wholly-owned subsidiary as of April 1, 2026 to comply with the provisions of ASC 805, Business Combinations, the Company reversed the entire $37.6 million balance included within equity investment in affiliates on the Condensed Consolidated Balance Sheets, as well as a corresponding $2.0 million deferred tax liability balance, so that their carrying values were zero at June 27, 2026. The carrying value of the Company's investment in Micro Bird included within equity investment in affiliates on the Condensed Consolidated Balance Sheets was $35.2 million at September 27, 2025.

The Company holds a 50% equity interest in Clean Bus Solutions, LLC ("CBS"), our unconsolidated joint venture that provided a fleet-as-a-service ("FaaS") offering using electric school buses manufactured and sold by the Company. The service was offered to qualified customers of the Company by providing them with turnkey electrification solutions, including a wide product range consisting of, among others, electric school buses, financing of electric buses and supporting charging infrastructure, project planning and management, and fleet optimization.

In the fourth quarter of fiscal 2025, the Company performed an impairment assessment of its equity investment in CBS. Based upon the historical losses generated by CBS since inception, when coupled with CBS' projections of continued losses in future periods, management determined that the Company would not recover the carrying amount of its investment in the near term. Accordingly, a conclusion was reached that an impairment that was other-than-temporary in nature existed. During the fourth quarter of fiscal 2025, the Company recorded a non-cash impairment charge of $7.4 million that reduced the carrying value of the Company's investment in CBS to $0 at September 27, 2025.

Through the course of its operations, CBS was unable to generate business on a timeline that was likely to generate profitable returns for the entity within the expectations of the Company and the other joint venture partner, Generate Capital, PBC (“Generate Capital”). In October 2025, the CBS Board of Managers met and voted to recommend to the joint venture partners to terminate the business, wind down operations, and dissolve the legal entity. On October 22, 2025, the Company's Board of Directors approved the termination of CBS and the joint venture agreement governing its operations. Upon obtaining similar approval from Generate Capital, the CBS Board of Managers authorized winding down and dissolution of the business on October 24, 2025, which was largely completed by the end of 2025.

The Company made (i) no cash contributions to CBS during the three months ended June 27, 2026, (ii) $0.4 million of cash contributions to CBS during the three months ended June 28, 2025 and (iii) $0.2 million and $0.9 million of cash contributions to CBS during the nine months ended June 27, 2026 and June 28, 2025, respectively, which increased the balance of equity investment in affiliates on the Condensed Consolidated Balance Sheets. The cash contributions during the nine months ended June 27, 2026 were made to allow CBS to pay its obligations in connection with winding down its operations, terminating its business and dissolving the entity.

In recognizing the Company’s 50% portion of CBS' net income or loss, the Company recorded zero and $(0.4) million in equity in net (loss) income of non-consolidated affiliates on the Condensed Consolidated Statements of Operations for the three months ended June 27, 2026 and June 28, 2025, respectively, and $(0.2) million and $(1.1) million for the nine months ended June 27, 2026 and June 28, 2025, respectively. CBS paid no dividends in any period.

At both June 27, 2026 and September 27, 2025, the carrying value of the Company's investment in CBS included within equity investment in affiliates on the Condensed Consolidated Balance Sheets was approximately $0.