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Stockholders' Equity | 9 Months Ended
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Sep. 30, 2025
Equity [Abstract] |
Stockholders' Equity | Weichai Transactions Weichai Shareholder’s Loan Agreements The Company entered into a $105.0 million Shareholder’s Loan Agreement (the “SLA”) with Weichai in August 2024. The SLA was fully repaid during the second quarter of 2025. See additional discussion of these debt agreements in Note 6. Debt. Weichai Collaboration Arrangement and Related Party Transactions The Company and Weichai executed a strategic collaboration agreement (the “Collaboration Agreement”) in March 2017 in order to achieve their respective strategic objectives and enhance the strategic cooperation alliance to share experiences, expertise and resources. Among other things, the Collaboration Agreement established a joint steering committee, permitted Weichai to select a limited number of certain technical, marketing, sales, procurement and finance personnel to work at the Company and established several collaborations related to stationary natural-gas applications and Weichai diesel engines. The Collaboration Agreement provided for the steering committee to create various sub-committees with operating roles and otherwise governs the treatment of intellectual property of parties prior to the collaboration and the intellectual property developed during the collaboration. On March 22, 2023, the Collaboration Agreement was extended for an additional term of three years. The Company evaluates whether an arrangement is a collaborative arrangement at its inception ba sed on the facts and circumstances specific to the arrangement. The Company also reevaluates whether an arrangement qualifies or continues to qualify as a collaborative arrangement whenever there is a change in either the roles of the participants or the participants’ exposure to significant risks and rewards dependent on the ultimate commercial success of the endeavor. For those collaborative arrangements where it is determined that the Company is the principal participant, costs incurred and revenue generated from third parties are recorded on a gross basis in the financial statement s. Purchases of inventory from Weichai were $3.1 million and $35.4 million for the three and nine months ended September 30, 2025, respectively. Purchases of inventory from Weichai were $13.2 million and $19.9 million for the three and nine months ended September 30, 2024, respectively. In January 2022, PSI and Societe Internationale des Moteurs Baudouin (“Baudouin”), a subsidiary of Weichai, entered into an international distribution and sales agreement that enables Baudouin to bring PSI’s power systems line of products into the European, Middle Eastern, and African markets. In addition to sales, Baudouin will manage service, support, warranty claims, and technical requests. Refer to the Consolidated Balance Sheets and Statements of Income for detailed related party information. See Note 14. Related Party Transactions for information regarding the purchase agreement with Shandong Weichai Import & Export Corporation, an affiliate of Weichai (“SWIEC”), and a manufacture of record (“MOR”) agreement with Weichai. Stockholders’ Equity Common and Treasury Stock The changes in shares of Common and Treasury Stock are as follows:
(in thousands) |  | Common Shares Issued |  | Treasury Stock Shares |  | Common Shares Outstanding
Balance as of December 31, 2024 |  | 23,117 |  |  | 117 |  |  | 23,000 |
Net shares issued for Stock awards |  | — |  |  | (40) |  |  | 40 |
Balance as of September 30, 2025 |  | 23,117 |  |  | 77 |  |  | 23,040 |

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