Commitments and Contingencies	6 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Commitments Licenses related to certain intellectual property The Company licenses certain intellectual property, some of which may be utilized in its current or future product offerings. To preserve the right to use such intellectual property, the Company is required to make annual minimum fixed payments totaling approximately $0.1 million as well as royalties based on net sales if the royalties exceed annual minimum fixed payments. As of both June 30, 2026 and December 31, 2025, the Company had accrued royalties of approximately $0.1 million included in Accrued expenses and other current liabilities on the Condensed Consolidated Balance Sheets. Other commitments The Company sponsors a 401(k) defined contribution plan covering all eligible U.S. employees (the “401(k) Plan”). Contributions to the 401(k) Plan are discretionary. The Company did not make any matching contributions to the 401(k) Plan for both the three and six months ended June 30, 2026 and 2025. Contingencies The Company is subject to claims in the ordinary course of business. Except as discussed below, the Company is not currently a party to any pending or threatened litigation, the outcome of which would be expected to have a material adverse effect on its financial condition, results of operations, or cash flows. The Company discloses contingent liabilities even if the liability is not probable or estimable, or both, if there is a reasonable possibility that a material loss may have been incurred. Delaware Stockholder Litigation On May 16, 2024, a putative class action lawsuit was filed in the Delaware Court of Chancery, styled Farzad v. HighCape Capital, et al. (the “Delaware Stockholder Litigation”). The Delaware Stockholder Litigation asserted breach of fiduciary duty claims against the former officers and directors of HighCape, including Kevin Rakin, Matt Zuga, David Colpman, Robert Taub and Antony Loebel, HighCape Capital Acquisition LLC and HighCape Capital L.P.; aiding and abetting breach of fiduciary duty claims against Foresite Capital Management, LLC and Dr. Rothberg; and unjust enrichment claims against all defendants related to the Business Combination. The Delaware Stockholder Litigation complaint alleged that the transactions contemplated by the Business Combination were a product of an unfair process which was allegedly impacted by conflicts of interest, resulting in mispricing of the Business Combination. Quantum-Si, as part of the Business Combination, had previously agreed to indemnify certain of the defendants related to actions such as the Delaware Stockholder Litigation to the extent allowable by law. On July 22, 2025, the parties of the Delaware Stockholder Litigation, through a mediation process, reached a preliminary settlement. In connection with the preliminary settlement, the Company recorded an accrued legal settlement liability of $8.0 million, consisting of $7.6 million for the settlement and $0.4 million for legal and related expenses, as well as a legal settlement insurance receivable of $4.6 million on the Consolidated Balance Sheets as of December 31, 2025. The Company also recognized associated legal settlement expenses of $3.4 million recorded in legal settlement, net of insurance proceeds, in the Consolidated Statements of Operations and Comprehensive Loss for the year ended December 31, 2025. Subsequently, on March 27, 2026, the Delaware Court of Chancery executed an order and final judgment approving the legal settlement. In the first quarter of 2026, the Company paid $3.0 million in connection with the settlement and the remaining $4.6 million was funded by insurance proceeds. Accordingly, the accrued legal settlement liability and associated legal settlement insurance receivable were derecognized from the Condensed Consolidated Balance Sheets in the first quarter of 2026.

The Company licenses certain intellectual property, some of which may be utilized in its current or future product offerings. To preserve the right to use such intellectual property, the Company is required to make annual minimum fixed payments totaling approximately $0.1 million as well as royalties based on net sales if the royalties exceed annual minimum fixed payments. As of both June 30, 2026 and December 31, 2025, the Company had accrued royalties of approximately $0.1 million included in Accrued expenses and other current liabilities on the Condensed Consolidated Balance Sheets.

The Company sponsors a 401(k) defined contribution plan covering all eligible U.S. employees (the “401(k) Plan”). Contributions to the 401(k) Plan are discretionary. The Company did not make any matching contributions to the 401(k) Plan for both the three and six months ended June 30, 2026 and 2025.

The Company is subject to claims in the ordinary course of business. Except as discussed below, the Company is not currently a party to any pending or threatened litigation, the outcome of which would be expected to have a material adverse effect on its financial condition, results of operations, or cash flows. The Company discloses contingent liabilities even if the liability is not probable or estimable, or both, if there is a reasonable possibility that a material loss may have been incurred.

On May 16, 2024, a putative class action lawsuit was filed in the Delaware Court of Chancery, styled Farzad v. HighCape Capital, et al. (the “Delaware Stockholder Litigation”). The Delaware Stockholder Litigation asserted breach of fiduciary duty claims against the former officers and directors of HighCape, including Kevin Rakin, Matt Zuga, David Colpman, Robert Taub and Antony Loebel, HighCape Capital Acquisition LLC and HighCape Capital L.P.; aiding and abetting breach of fiduciary duty claims against Foresite Capital Management, LLC and Dr. Rothberg; and unjust enrichment claims against all defendants related to the Business Combination. The Delaware Stockholder Litigation complaint alleged that the transactions contemplated by the Business Combination were a product of an unfair process which was allegedly impacted by conflicts of interest, resulting in mispricing of the Business Combination. Quantum-Si, as part of the Business Combination, had previously agreed to indemnify certain of the defendants related to actions such as the Delaware Stockholder Litigation to the extent allowable by law.

On July 22, 2025, the parties of the Delaware Stockholder Litigation, through a mediation process, reached a preliminary settlement. In connection with the preliminary settlement, the Company recorded an accrued legal settlement liability of $8.0 million, consisting of $7.6 million for the settlement and $0.4 million for legal and related expenses, as well as a legal settlement insurance receivable of $4.6 million on the Consolidated Balance Sheets as of December 31, 2025. The Company also recognized associated legal settlement expenses of $3.4 million recorded in legal settlement, net of insurance proceeds, in the Consolidated Statements of Operations and Comprehensive Loss for the year ended December 31, 2025.

Subsequently, on March 27, 2026, the Delaware Court of Chancery executed an order and final judgment approving the legal settlement. In the first quarter of 2026, the Company paid $3.0 million in connection with the settlement and the remaining $4.6 million was funded by insurance proceeds. Accordingly, the accrued legal settlement liability and associated legal settlement insurance receivable were derecognized from the Condensed Consolidated Balance Sheets in the first quarter of 2026.