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Long-Term Debt​, Net of Debt Discount and Financing Fees - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Dec. 10, 2020 | Jun. 30, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2021 | Mar. 31, 2021
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest expense |  |  | $ 624 | $ 1,356 | $ 1,054 |  |
Interest costs capitalized |  |  | 6,155 | 4,277 |  |  |
Amortization of debt discount and deferred financing fees |  |  | 891 | 831 | $ 232 |  |
Restricted cash |  |  | 6,251 | 6,251 |  |  |
Standby Letters of Credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Collateral amount |  |  |  |  |  |  | $ 250
Restricted Cash |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Collateral amount |  |  | 6,000 | 6,000 |  |  |
Debt derivative liabilities |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt derivative liabilities |  | $ 2,387 |  |  |  |  |
Oberland Option |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Exercise price of warrants (in USD per share) | $ 14.13 |  |  |  |  |  |
Oberland Option | TPC Investments II LP |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Number of shares called by warrants (in shares) | 247,699 |  |  |  |  |  |
Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Term of debt |  | 7 years |  |  |  |  |
Principal balance |  |  | $ 45,712 | 45,325 |  |  |
Financing costs |  | $ 642 |  |  |  | $ 642 |
Period for which quarterly interest payments are required |  | 7 years |  |  |  |  |
Interest rate |  | 7.50% |  |  |  |  |
Interest rate at period end |  |  | 11.24% |  |  |  |
Threshold revenue achievement for payment of additional quarterly royalty |  | $ 70,000 |  |  |  |  |
Additional payment percentage |  | 1.00% |  |  |  |  |
Interest expense |  |  | $ 756 | 646 |  |  |
Interest paid |  |  | $ 5,074 | 4,103 |  |  |
Make-whole payment, minimum required internal rate of return |  | 11.50% |  |  |  |  |
Interest rate increase in the event of default |  | 4.00% |  |  |  |  |
Credit Facility | Oberland Option |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Value of warrants outstanding |  | $ 3,500 |  |  |  |  |
Moving average of closing stock |  |  | 45 days |  |  |  |
Gross proceeds from warrant exercises | $ 3,500 |  |  |  |  |  |
Credit Facility | LIBOR |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Additional interest floor rate |  | 2.00% |  |  |  |  |
First Tranche |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal balance |  | $ 35,000 | $ 35,000 | 35,000 |  |  |
First Tranche | Debt derivative liabilities |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt derivative liabilities |  |  |  |  |  | 1,076 |
Second Tranche |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Principal balance |  |  | $ 15,000 | $ 15,000 |  | 15,000 |
Second Tranche | Debt derivative liabilities |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Debt derivative liabilities |  |  |  |  |  | $ 1,961 |

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