Organization and Description of Business	6 Months Ended
Jun. 30, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization and Description of Business	Organization and Description of Business System1, Inc. and its subsidiaries (the "Company", "we", "our" or "us") operates flagship internet utilities including CouponFollow, MapQuest, and Startpage, and a best-in-class marketing platform powered by artificial intelligence, enabling third party publishers ("Network Partners") to monetize and maximize the value of user traffic across a wide range of advertising category verticals. Liquidity and Going Concern We have evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year after the date that the condensed consolidated financial statements are issued. We have experienced declining cash flows and financial performance primarily as a result of reductions in Advertising Partners and overall consumer demand for our marketing services. As of June 30, 2026, we had cash and cash equivalents of $40.5 million and negative net working capital, which we define as current assets less current liabilities, of $27.4 million. We had an aggregate principal amount outstanding of $50.0 million under our revolving facility (as defined in Note 5, Debt, Net) with a maturity date of January 27, 2027, and $245.1 million of term debt outstanding on our term loan which matures in July 2027. At our annual meeting of stockholders held on July 22, 2026, the stockholders approved an exchange agreement with all lenders under our existing credit agreement, satisfying settlement of the outstanding balance on our revolving facility which was due January 2027, reducing the principal of the term loan to $150.0 million and extending the maturity date to January 2031, and making a one-time cash payment of $20.9 million to the lenders. For information See Item 1, "Financial Statements — Note 5, Debt, Net". Our principal sources of liquidity are expected to be from cash on hand and cash flows from financing activities. Our ability to fund future operating expenses and capital expenditures, and our ability to meet our future debt service obligations, will depend on our ability to execute on our operational strategy and may be affected by our profitability, as well as general economic, financial and other factors which are beyond our control. Management determined, as a result of this evaluation, that our current cash and cash equivalents and net working capital position raise substantial doubt about our ability to continue as a going concern for the twelve month period following the date of this filing. Management has initiated cost-reduction programs consisting of reduction in force and reducing activities for businesses, which immediately reduced our cash burn rate. Management cannot conclude as of the date of this filing that its plans are probable of mitigating the conditions and events that raise substantial doubt. As a result, management has concluded that substantial doubt exists about our ability to continue as a going concern. Our condensed consolidated financial statements have been prepared on a basis that assumes we will continue as a going concern which contemplates the realization of assets and satisfaction of liabilities and commitments in the ordinary course of business. Accordingly, the accompanying condensed consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty.

System1, Inc. and its subsidiaries (the "Company", "we", "our" or "us") operates flagship internet utilities including CouponFollow, MapQuest, and Startpage, and a best-in-class marketing platform powered by artificial intelligence, enabling third party publishers ("Network Partners") to monetize and maximize the value of user traffic across a wide range of advertising category verticals.

We have evaluated whether there are conditions and events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year after the date that the condensed consolidated financial statements are issued.

We have experienced declining cash flows and financial performance primarily as a result of reductions in Advertising Partners and overall consumer demand for our marketing services. As of June 30, 2026, we had cash and cash equivalents of $40.5 million and negative net working capital, which we define as current assets less current liabilities, of $27.4 million. We had an aggregate principal amount outstanding of $50.0 million under our revolving facility (as defined in Note 5, Debt, Net) with a maturity date of January 27, 2027, and $245.1 million of term debt outstanding on our term loan which matures in July 2027. At our annual meeting of stockholders held on July 22, 2026, the stockholders approved an exchange agreement with all lenders under our existing credit agreement, satisfying settlement of the outstanding balance on our revolving facility which was due January 2027, reducing the principal of the term loan to $150.0 million and extending the maturity date to January 2031, and making a one-time cash payment of $20.9 million to the lenders. For information See Item 1, "Financial Statements — Note 5, Debt, Net".

Our principal sources of liquidity are expected to be from cash on hand and cash flows from financing activities. Our ability to fund future operating expenses and capital expenditures, and our ability to meet our future debt service obligations, will depend on our ability to execute on our operational strategy and may be affected by our profitability, as well as general economic, financial and other factors which are beyond our control.

Management determined, as a result of this evaluation, that our current cash and cash equivalents and net working capital position raise substantial doubt about our ability to continue as a going concern for the twelve month period following the date of this filing. Management has initiated cost-reduction programs consisting of reduction in force and reducing activities for businesses, which immediately reduced our cash burn rate. Management cannot conclude as of the date of this filing that its plans are probable of mitigating the conditions and events that raise substantial doubt. As a result, management has concluded that substantial doubt exists about our ability to continue as a going concern.

Our condensed consolidated financial statements have been prepared on a basis that assumes we will continue as a going concern which contemplates the realization of assets and satisfaction of liabilities and commitments in the ordinary course of business. Accordingly, the accompanying condensed consolidated financial statements do not include any adjustments that might result from the outcome of this uncertainty.