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12.5% Senior Secured Notes and Loans Payable - Narrative (Details) |  |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 07, 2021 USD ($) | Nov. 03, 2020 USD ($) vestingPeriod shares | Jul. 15, 2019 USD ($) $ / shares shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2021 USD ($) | Dec. 16, 2022 USD ($) | Nov. 04, 2022 USD ($) | May 15, 2022 vestingPeriod | Aug. 06, 2021 USD ($) shares | Dec. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Warrants issued (in shares) | shares |  |  | 2,000,000 |  |  |  |  |  |  |
Exercise price of warrants (in usd per share) | $ / shares |  |  | $ 0.001 |  |  |  |  |  |  |
Net proceeds from issuance of initial notes, warrants and first offer rights |  |  | $ 66,082,000 |  |  |  |  |  |  |
Number of transactions | vestingPeriod |  | 2 |  |  |  |  |  |  |  |
Premium on early retirement of debt |  | $ 2,250,000 |  |  |  |  |  |  |  |
Consent fee payment |  |  |  | $ 2,025,000 | $ 0 |  |  |  |  |
Loss on the extinguishment of debt |  |  |  | 0 | 13,822,000 |  |  |  |  |
Amortization of debt issuance costs and discounts |  |  |  | $ 215,000 | 3,731,000 |  |  |  |  |
Maximum | Marathon Pangolin Royalty LLC |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Percentage of cash proceeds |  |  | 30.00% |  |  |  |  |  |  |
Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of debt |  | 4,000,000 |  |  |  |  |  |  |  |
Payments of loan costs |  | $ 220,000 |  |  |  |  |  |  |  |
Senior Secured Notes Due 2025 |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate |  |  |  | 12.50% |  |  |  |  |  |
Principal amount |  |  | $ 70,000,000 |  |  |  |  |  |  |
Warrants issued (in shares) | shares |  |  |  |  |  |  |  |  | 714,000 |
Warrants issued to purchase common stock (in shares) | shares |  | 143,000,000 |  |  |  |  |  |  |  |
Additional borrowing capacity |  |  |  |  |  |  |  |  | $ 30,000,000 |
Redemption percentage of debt under change of control provisions |  |  | 101.00% |  |  |  |  |  |  |
Debt instrument, amount redeemed |  |  |  |  |  | $ 1,882,000 | $ 3,765,000 |  |  |
Amortization of debt issuance costs and discounts |  |  |  | $ 16,000 | 3,572,000 |  |  |  |  |
Unamortized deferred debt issuance cost and deferred debt discounts |  |  |  | 27,000 | 43,000 |  |  |  |  |
Senior Secured Notes Due 2025 | Put Option |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Fair value |  |  |  | $ 45,000 |  |  |  |  |  |
Senior Secured Notes Due 2025 | Put Option | Other Noncurrent Liabilities |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Fair value |  |  |  |  | 98,000 |  |  |  |  |
Senior Secured Notes Due 2025 | Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Principal amount |  |  | $ 100,000,000 |  |  |  |  |  |  |
Elective redemption percentage of debt |  |  | 112.50% |  |  |  |  |  |  |
Senior Secured Notes Due 2025 | Minimum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Elective redemption percentage of debt |  |  | 101.56% |  |  |  |  |  |  |
Senior Secured Notes Due 2025 | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate |  |  | 12.50% | 12.50% |  |  |  |  |  |
Retirement of debt |  | $ 22,500,000 |  |  |  |  |  |  |  |
Long-term debt |  | $ 70,000,000 |  | $ 51,500,000 |  |  |  |  |  | $ 51,500,000
Repurchase price percentage |  |  | 112.50% |  |  |  |  |  |  |
Consent fee payment | $ 2,700,000 |  |  |  |  |  |  |  |  |
Number of quarterly payments | vestingPeriod |  |  |  |  |  |  |  | 4 |  |
Loss on the extinguishment of debt |  |  |  |  | $ 13,822,000 |  |  |  |  |
Senior Secured Notes Due 2025 - First Additional Offering |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Additional borrowing capacity |  |  |  |  |  |  |  |  | 10,000,000 |
Senior Secured Notes Due 2025 - First Additional Offering | Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Warrants issued (in shares) | shares |  |  |  | 2,143,000 |  |  |  |  |  |
Senior Secured Notes Due 2025 - Second Additional Offering |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Additional borrowing capacity |  |  |  |  |  |  |  |  | $ 20,000,000 |

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