| Restricted Cash - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
| Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Jul. 31, 2025 | Dec. 31, 2024 | |
| Restricted Cash and Cash Equivalent Item [Line Items] | ||||||
| Guarantor obligations | $ 58,900 | $ 58,900 | $ 58,900 | |||
| Interest income | 1,131 | $ 1,029 | 2,531 | $ 3,382 | ||
| Restricted Cash | ||||||
| Restricted Cash and Cash Equivalent Item [Line Items] | ||||||
| Interest income | 300 | $ 300 | 800 | $ 900 | ||
| Surety bond | ||||||
| Restricted Cash and Cash Equivalent Item [Line Items] | ||||||
| Guarantor obligations | 28,300 | 28,300 | 27,500 | |||
| Surety bond, Hycroft Mine financial requirements | ||||||
| Restricted Cash and Cash Equivalent Item [Line Items] | ||||||
| Guarantor obligations | 58,300 | 58,300 | 58,300 | |||
| Surety Bond, Hycroft Mine financial requirements, water well field and exploration | ||||||
| Restricted Cash and Cash Equivalent Item [Line Items] | ||||||
| Guarantor obligations | $ 400 | $ 400 | $ 200 | $ 400 | ||