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Summary of Significant Accounting Policies (Narrative) (Details) |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 11, 2025 USD ($) shares | Dec. 31, 2025 USD ($) customer segment | Dec. 31, 2024 USD ($) customer | Dec. 31, 2023 USD ($) customer | Mar. 31, 2025 USD ($) | Mar. 26, 2025 USD ($) | Jan. 31, 2025 USD ($) | Jun. 14, 2024 USD ($)
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Non-cash interest charges |  |  |  | $ 144,000 |  |  |  |
Number of reportable segments | segment |  | 1 |  |  |  |  |  |
Number of operating segments | segment |  | 1 |  |  |  |  |  |
Available for sale securities, credit loss expense |  | $ 0 |  |  |  |  |  |
Investments |  |  | $ 0 |  |  |  |  |
Common stock warrant liability |  | 0 | 20,835,000 |  |  |  |  |
Derivative liability | $ 24,600,000 | 0 |  |  |  | $ 20,800,000 | $ 11,100,000 | $ 1,100,000
Impairment of long-lived assets |  | 0 | 0 | 0 |  |  |  |
Debt conversion, converted instrument, amount |  | 94,139,000 |  |  |  |  |  |
Debt conversion, derivative liability reclassified to additional paid in capital | 24,600,000 |  |  |  |  |  |  |
Debt conversion, debt issuance costs reclassified to additional paid in capital | $ 28,800,000 |  |  |  |  |  |  |
Deferred offering costs |  | $ 0 | 413,000 |  |  |  |  |
Preferred stock, aggregate dividends |  |  |  | 1,239,000 |  |  |  |
Revenue, customer contract period (in days) |  | 30 days |  |  |  |  |  |
Advertising expense |  | $ 2,000,000.0 | 1,500,000 | 778,000 |  |  |  |
Foreign exchange transaction (losses) |  | (216,000) | (269,000) | (172,000) |  |  |  |
Foreign currency translation gain (loss) |  | $ 191,000 | $ (271,000) | $ (504,000) |  |  |  |
Conversion of redeemable convertible preferred stock to common stock upon IPO (in shares) | shares | 51,226,348 |  |  |  |  |  |  |
2025 Convertible Notes [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Derivative liability |  |  |  |  | $ 20,800,000 |  | $ 11,100,000 |
Debt conversion, converted instrument, amount | $ 98,300,000 |  |  |  |  |  |  |
Conversion of redeemable convertible preferred stock to common stock upon IPO (in shares) | shares | 6,470,743 |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Debt conversion, shares issued | shares | 6,470,743 |  |  |  |  |  |  |
Conversion of redeemable convertible preferred stock to common stock upon IPO (in shares) | shares | 51,226,348 |  |  |  |  |  |  |
Stock Options [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Applicable service period (in years) |  | 4 years |  |  |  |  |  |
Implementation and Onboarding Costs [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Capitalized contract cost, amortization period (in years) |  | 2 years |  |  |  |  |  |
New Site Commission Costs [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Capitalized contract cost, amortization period (in years) |  | 3 years |  |  |  |  |  |
No Customer [Member] | Customer Concentration Risk [Member] | Revenue Benchmark [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Number of major customers | customer |  | 0 | 0 | 0 |  |  |  |
No Customer [Member] | Customer Concentration Risk [Member] | Accounts Receivable [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Number of major customers | customer |  | 0 | 0 |  |  |  |  |
Minimum [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, plant and equipment, useful life |  | 2 years |  |  |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, plant and equipment, useful life |  | 5 years |  |  |  |  |  |
Capitalized Internal-Use Software [Member] |  |  |  |  |  |  |  |
Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, plant and equipment, useful life |  | 2 years |  |  |  |  |  |

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