Basis of Presentation and Summary of Significant Accounting Policies - Professional Engineering Contracts (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Accounting Policies [Abstract] | ||||
| Revenue | $ (80) | $ 758 | $ 1,570 | $ (471) |
| Basic net loss per share (in usd per share) | $ 0.00 | $ 0.02 | $ 0.04 | $ (0.01) |
| Diluted net loss per share (in usd per share) | $ 0.00 | $ 0.02 | $ 0.04 | $ (0.01) |