Fair Value Measurement - Schedule of financial assets and liabilities measured at fair value on a recurring basis (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Warrant liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities Fair Value Disclosure, Total	$ 21	$ 38
Level 1 \| Warrant liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities Fair Value Disclosure, Total	0	0
Level 2 \| Warrant liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities Fair Value Disclosure, Total	21	38
Level 3 \| Warrant liabilities
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financial Liabilities Fair Value Disclosure, Total	0	0
Cash Equivalents [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents (investments in money market funds)	23,589	22,749
Cash Equivalents [Member] \| Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents (investments in money market funds)	0	0
Cash Equivalents [Member] \| Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents (investments in money market funds)	23,589	22,749
Cash Equivalents [Member] \| Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash equivalents (investments in money market funds)	$ 0	$ 0

Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.