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12.5% Senior Secured Notes and Loans Payable, 12.5% Senior Secured Notes (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Nov. 03, 2020 | Jul. 15, 2019 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2025 | Sep. 30, 2022 | Dec. 31, 2020
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Warrants issued (in shares) |  | 2,000,000 |  |  |  |  |  |  |
Warrant exercise price (in dollars per share) |  | $ 0.001 |  |  |  |  |  |  |
Net proceeds from issuance of initial notes, warrants and first offer rights |  | $ 66,082 |  |  |  |  |  |  |
Long-term debt |  |  | $ 51,500 |  | $ 51,500 |  |  |  |
Premium on early retirement of debt | $ 2,250 |  |  |  | 2,250 |  |  |  |
Loans payable, current |  |  | $ 5,150 |  | 5,150 |  |  |  | $ 2,575
Amortization expense, deferred debt issuance costs and debt discounts |  |  |  |  | $ 2,388 | $ 1,167 |  |  |
Forecast |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Principal payments, percentage of face amount |  |  |  |  |  |  | 40.00% | 10.00% |
Senior Notes |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Proceeds from refinancing of debt | 4,000 |  |  |  |  |  |  |  |
Payments of loan costs | $ 220 |  |  |  |  |  |  |  |
Maximum | Marathon Pangolin Royalty LLC |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Percentage of cash proceeds |  |  |  |  | 30.00% |  |  |  |
Senior Secured Notes Due 2025 |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Principal amount |  | 70,000 |  |  |  |  |  |  |
Warrants issued (in shares) | 714,000 |  |  |  |  |  |  |  |
Interest rate |  |  | 12.50% |  | 12.50% |  |  |  |
Additional borrowing capacity |  |  | $ 30,000 |  | $ 30,000 |  |  |  |
Warrants issued to purchase common stock (in shares) | 143,000 |  |  |  |  |  |  |  |
Redemption percentage of debt under change of control provisions |  |  |  |  | 101.00% |  |  |  |
Amortization expense, deferred debt issuance costs and debt discounts |  |  | 1,165 | $ 583 | $ 2,317 | $ 1,167 |  |  |
Unamortized deferred debt issuance cost and deferred debt discounts |  |  | 12,280 |  | 12,280 |  |  |  | 14,596
Senior Secured Notes Due 2025 | Put Option |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Fair value of put option |  |  | 221 |  | 221 |  |  |  |
Senior Secured Notes Due 2025 | Put Option | Accrued Expenses |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Fair value of put option |  |  | 66 |  | 66 |  |  |  |
Senior Secured Notes Due 2025 | Put Option | Other Noncurrent Liabilities |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Fair value of put option |  |  | $ 155 |  | $ 155 |  |  |  |
Senior Secured Notes Due 2025 | Senior Notes |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Repayment of debt | $ 22,500 |  |  |  |  |  |  |  |
Long-term debt | $ 70,000 |  |  |  |  |  |  |  | $ 51,500
Interest rate |  |  | 12.50% |  | 12.50% |  |  |  | 12.50%
Repurchase price percentage |  |  |  |  | 112.50% |  |  |  |
Senior Secured Notes Due 2025 | Minimum |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Elective redemption percentage of debt |  |  |  |  | 101.56% |  |  |  |
Senior Secured Notes Due 2025 | Maximum |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Principal amount |  | $ 100,000 |  |  |  |  |  |  |
Elective redemption percentage of debt |  |  |  |  | 112.50% |  |  |  |
Senior Secured Notes Due 2025 - First Additional Offering |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Warrant exercise price (in dollars per share) |  |  | $ 0.001 |  | $ 0.001 |  |  |  |
Additional borrowing capacity |  |  | $ 10,000 |  | $ 10,000 |  |  |  |
Senior Secured Notes Due 2025 - First Additional Offering | Maximum |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Warrants issued (in shares) |  |  | 2,143,000 |  | 2,143,000 |  |  |  |
Senior Secured Notes Due 2025 - Second Additional Offering |  |  |  |  |  |  |  |  |
12.5% Senior Secured Notes [Abstract] |  |  |  |  |  |  |  |  |
Additional borrowing capacity |  |  | $ 20,000 |  | $ 20,000 |  |  |  |

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