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Long-Term Debt, Net of Debt Discount and Financing Fees - Narrative (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2020 | Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Debt Instrument [Line Items] |  |  |  |  |  |
Amortization of debt discount and deferred financing fees |  | $ 223 | $ 153 | $ 442 | $ 227 |
Restricted cash |  | 6,251 |  | 6,251 |  | $ 6,251
Restricted Cash |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Collateral amount |  | 6,000 |  | 6,000 |  | 250
Debt derivative liabilities |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Fair value of derivatives |  | 4,876 |  | 4,876 |  | 5,562
Oberland Facility |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Term of debt | 7 years |  |  |  |  |
Long-term debt |  | $ 45,263 |  | $ 45,263 |  | 45,325
Period for which quarterly interest payments should be made | 7 years |  |  |  |  |
Interest rate | 7.50% |  |  |  |  |
Interest rate at period end |  | 9.50% |  | 9.50% |  |
Threshold revenue achievement for payment of additional quarterly royalty | $ 70,000 |  |  |  |  |
Additional payment percentage | 1.00% |  |  |  |  |
Interest costs incurred |  | $ 372 | 260 | $ 707 | 260 |
Cash paid for interest |  | 1,201 | 840 | 2,388 | 1,672 |
Interest capitalized |  | 1,579 | 645 | 3,024 | 1,690 |
Accumulated capitalized interest costs |  | 8,298 |  | 8,298 |  |
Financing costs |  | 642 |  | 642 |  |
Oberland Facility | LIBOR |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Additional interest floor rate | 2.00% |  |  |  |  |
First Tranche |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt | $ 35,000 | 35,000 |  | 35,000 |  | 35,000
Second Tranche |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt |  | $ 15,000 | $ 15,000 | $ 15,000 | $ 15,000 | $ 15,000

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