Borrowings - Narrative (Details)
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1 Months Ended |
3 Months Ended |
6 Months Ended |
7 Months Ended |
46 Months Ended |
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Jun. 30, 2025
USD ($)
$ / shares
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Jun. 03, 2025
USD ($)
tradingDay
$ / shares
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May 28, 2025
USD ($)
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Jan. 24, 2025
USD ($)
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Dec. 31, 2024
USD ($)
$ / shares
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Nov. 26, 2024
USD ($)
tranche
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Oct. 31, 2024
USD ($)
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Aug. 29, 2024
USD ($)
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Jun. 21, 2024
USD ($)
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Jul. 29, 2022
USD ($)
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Sep. 30, 2022
USD ($)
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Sep. 30, 2021
USD ($)
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Jun. 30, 2025
USD ($)
$ / shares
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Jun. 30, 2024
USD ($)
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Jun. 30, 2025
USD ($)
$ / shares
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Jun. 30, 2024
USD ($)
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Jun. 30, 2025
USD ($)
$ / shares
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Jun. 30, 2025
USD ($)
$ / shares
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Jun. 13, 2025
USD ($)
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Jun. 11, 2025
USD ($)
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Apr. 16, 2025
USD ($)
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Jan. 31, 2025
USD ($)
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Aug. 31, 2024
USD ($)
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Jun. 20, 2024
USD ($)
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Jan. 31, 2023
USD ($)
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Jan. 18, 2023
USD ($)
$ / shares
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Jul. 06, 2021
USD ($)
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Debt Instrument [Line Items] |
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Common stock, par value (in dollars per share) | $ / shares |
$ 0.0001
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$ 0.0001
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$ 0.0001
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$ 0.0001
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$ 0.0001
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$ 0.0001
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Proceeds from issuance of secured debt |
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$ 38,475,000
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$ 70,075,000
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Change in fair value of debt - credit risk - related party |
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$ (6,224,000)
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$ 0
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(6,224,000)
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0
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Loss (gain) on debt extinguishment |
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49,063,000
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(68,478,000)
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49,063,000
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(68,478,000)
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Change in the fair value of debt |
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31,615,000
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(240,000)
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25,682,000
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(240,000)
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Change in fair value of debt - credit risk - related party |
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6,224,000
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0
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6,224,000
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0
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Loss from in fair value of risk adjustment, before reclassification |
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22,469,000
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Change in fair value of risk, reclassification adjustment |
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16,245,000
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Carrying Value |
$ 445,277,000
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$ 316,896,000
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445,277,000
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445,277,000
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$ 445,277,000
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$ 445,277,000
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Long-term debt, current |
1,073,000
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2,014,000
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1,073,000
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1,073,000
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1,073,000
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1,073,000
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Cash paid for interest |
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127,000
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4,131,000
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Related Party |
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Debt Instrument [Line Items] |
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Accumulated other comprehensive income (loss) |
(49,714,000)
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(43,490,000)
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(49,714,000)
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$ (49,714,000)
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(49,714,000)
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(49,714,000)
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Secured Debt |
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Debt Instrument [Line Items] |
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Temporary equity dividend rate percentage |
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1.00%
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Delayed Draw Term Loan |
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Debt Instrument [Line Items] |
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Fair Value |
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$ 2,381,000
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Repayments of long-term debt |
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47,619,000
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Delayed Draw Term Loan | Secured Debt |
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Debt Instrument [Line Items] |
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Principal amount |
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$ 210,500,000
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Stated interest rate |
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7.00%
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Proceeds from issuance of secured debt |
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$ 40,500,000
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$ 65,000,000
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$ 30,000,000
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Percentage of original issue discount |
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5.00%
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Proceeds from issuance of unsecured debt, net of original issue discount |
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$ 38,475,000
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61,750,000
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$ 28,500,000
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Percentage of debt exit fee |
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5.00%
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Restricted cash minimum liquidity requirement increases |
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15,000,000
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Delayed milestone penalty, aggregate, percentage |
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1.00%
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Debt instrument, writ or warrant excess amount |
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$ 2,500,000
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Fair Value |
61,705,000
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$ 28,340,000
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61,705,000
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$ 61,705,000
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61,705,000
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61,705,000
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$ 17,312,000
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$ 12,528,000
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$ 25,653,000
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Change in the fair value of debt |
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31,615,000
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25,682,000
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Percentage of additional debt instrument, interest rate |
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5.00%
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Carrying Value |
61,705,000
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76,188,000
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61,705,000
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61,705,000
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61,705,000
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61,705,000
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2021 Convertible Note | Convertible Notes |
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Debt Instrument [Line Items] |
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Principal amount |
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$ 122,868,000
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$ 100,000,000
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Loss (gain) on debt extinguishment |
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10,688,000
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(10,688,000)
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Carrying Value |
0
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109,838,000
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0
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0
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0
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0
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Repayments of long-term debt |
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131,000,000
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Debt instrument, premium repayment contingency |
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5,000,000
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Proceeds from repayment of debt premium |
5,000,000
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Interest payable |
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0
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Embedded conversion feature |
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1,272,000
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Non-cash interest expense - related parties |
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2,671,000
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3,479,000
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6,613,000
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6,895,000
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Cash paid for interest |
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3,072,000
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DOE Loan Facility |
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Debt Instrument [Line Items] |
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Carrying Value |
68,023,000
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65,452,000
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68,023,000
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68,023,000
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68,023,000
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68,023,000
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DOE Loan Facility | DOE Loan Facility Tranche 1 |
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Debt Instrument [Line Items] |
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Maximum borrowing capacity |
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$ 90,945,000
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DOE Loan Facility | DOE Loan Facility Tranche 2 |
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Debt Instrument [Line Items] |
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Maximum borrowing capacity |
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106,733,000
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DOE Loan Facility | DOE Loan Facility Tranche 3 |
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Debt Instrument [Line Items] |
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Maximum borrowing capacity |
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67,529,000
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DOE Loan Facility | DOE Loan Facility Tranche 4 |
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Debt Instrument [Line Items] |
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Maximum borrowing capacity |
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$ 12,290,000
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DOE Loan Facility | DOE Loan Facility Tranche 1 |
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Debt Instrument [Line Items] |
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Maximum borrowing capacity |
$ 90,945,000
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$ 101,979,000
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$ 90,945,000
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$ 90,945,000
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$ 90,945,000
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$ 90,945,000
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DOE Loan Facility | DOE Loan Facility Tranche 2 |
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Debt Instrument [Line Items] |
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Maximum borrowing capacity |
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117,326,000
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DOE Loan Facility | DOE Loan Facility Tranche 3 |
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Debt Instrument [Line Items] |
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Maximum borrowing capacity |
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71,836,000
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DOE Loan Facility | DOE Loan Facility Tranche 4 |
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Debt Instrument [Line Items] |
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|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Maximum borrowing capacity |
|
|
|
|
|
12,309,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
DOE Loan Facility | Line of Credit |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stated interest rate |
4.791%
|
|
|
|
|
|
|
|
|
|
|
|
4.791%
|
|
4.791%
|
|
4.791%
|
4.791%
|
|
|
|
|
|
|
|
|
|
Carrying Value |
$ 68,023,000
|
|
|
|
65,452,000
|
|
|
|
|
|
|
|
$ 68,023,000
|
|
$ 68,023,000
|
|
$ 68,023,000
|
$ 68,023,000
|
|
|
|
|
|
|
|
|
|
Maximum borrowing capacity |
|
|
|
|
|
277,497,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Line of credit facility, maximum capitalized interest |
|
|
|
|
|
$ 25,953,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Eligible project costs, percentage |
|
|
|
|
|
80.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Proceeds from long-term lines of credit |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(68,279,000)
|
|
|
|
|
|
|
|
|
|
|
Non-cash interest expense - related parties |
|
|
|
|
|
|
|
|
|
|
|
|
1,408,000
|
|
2,835,000
|
|
|
|
|
|
|
|
|
|
|
|
|
Funding Cost of Debt, Percentage |
|
|
|
|
|
20.00%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
DOE Loan Facility | Line of Credit | US Treasury (UST) Interest Rate |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Variable rate spread |
|
|
|
|
|
0.375%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
DOE Loan Facility | Line of Credit | DOE Loan Facility Tranche 1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Proceeds from long-term lines of credit |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(68,279,000)
|
|
|
|
|
|
|
|
|
|
|
|
|
DOE Loan Facility | Line of Credit | Minimum |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt instrument, number of tranches | tranche |
|
|
|
|
|
2
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
DOE Loan Facility | Line of Credit | Maximum |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt instrument, number of tranches | tranche |
|
|
|
|
|
4
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
DOE Loan Facility | PIK Interest |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Carrying Value |
68,023,000
|
|
|
|
65,452,000
|
|
|
|
|
|
|
|
68,023,000
|
|
68,023,000
|
|
68,023,000
|
68,023,000
|
|
|
|
|
|
|
|
|
|
Interest payable |
128,000
|
|
|
|
|
|
|
|
|
|
|
|
128,000
|
|
128,000
|
|
128,000
|
128,000
|
|
|
|
|
|
|
|
|
|
AFG Convertible Note | Related Party |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Interest payable |
2,962,000
|
|
|
|
4,924,000
|
|
|
|
|
|
|
|
2,962,000
|
|
2,962,000
|
|
2,962,000
|
2,962,000
|
|
|
|
|
|
|
|
|
|
AFG Convertible Note | Convertible Notes |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Conversion price per unit (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 1.67
|
|
Common stock, par value (in dollars per share) | $ / shares |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 0.0001
|
|
AFG Convertible Note | Convertible Notes | Related Party |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Principal amount |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 13,750,000
|
$ 13,750,000
|
|
Carrying Value |
75,225,000
|
|
|
|
63,033,000
|
|
|
|
|
|
|
|
75,225,000
|
|
75,225,000
|
|
75,225,000
|
75,225,000
|
|
|
|
|
|
|
|
|
|
Paid-in-kind interest rate |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
26.50%
|
26.50%
|
|
Embedded conversion feature |
51,639,000
|
|
|
|
43,124,000
|
|
|
|
|
|
|
|
51,639,000
|
|
51,639,000
|
|
51,639,000
|
51,639,000
|
|
|
|
|
|
|
|
|
|
Non-cash interest expense - related parties |
|
|
|
|
|
|
|
|
|
|
|
|
1,839,000
|
1,433,000
|
3,678,000
|
2,868,000
|
|
|
|
|
|
|
|
|
|
|
|
Senior Secured Term Loan | Minimum | SOFR |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Variable rate spread |
|
|
|
|
|
|
|
|
|
0.2616%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Senior Secured Term Loan | Minimum | NYFRB |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Variable rate spread |
|
|
|
|
|
|
|
|
|
0.50%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Senior Secured Term Loan | Secured Debt |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Principal amount |
|
|
|
|
|
|
|
|
|
$ 100,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Number of days prior to current maturity date |
|
|
|
|
|
|
|
|
|
91 days
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Senior Secured Term Loan | Secured Debt | Atlas Credit Agreement |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Principal amount |
|
|
|
|
|
|
|
|
$ 100,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
100,000,000
|
|
|
|
Long-term restricted cash |
|
|
|
|
|
|
|
|
11,900,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
$ 11,900,000
|
|
|
|
Debt instrument, participation lieu payments |
|
|
|
|
|
|
|
|
1,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Payment for debt extinguishment cost |
|
|
|
|
|
|
|
|
$ 8,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Number of days prior to current maturity date |
|
|
|
|
|
|
|
|
91 days
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Senior Secured Term Loan | Secured Debt | Insurer Letter Agreement |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Payment for debt extinguishment cost |
4,000,000
|
|
|
|
3,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Senior Secured Term Loan | SOFR Loans |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Variable rate spread |
|
|
|
|
|
|
|
|
|
8.50%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Senior Secured Term Loan | ABR Loans |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Stated interest rate |
|
|
|
|
|
|
|
|
|
7.50%
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Equipment financing facility |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Carrying Value |
1,073,000
|
|
|
|
2,385,000
|
|
|
|
|
|
|
|
1,073,000
|
|
1,073,000
|
|
1,073,000
|
1,073,000
|
|
|
|
|
|
|
|
|
|
Long-term line of credit |
1,073,000
|
|
|
|
2,385,000
|
|
|
|
|
|
|
|
1,073,000
|
|
1,073,000
|
|
1,073,000
|
1,073,000
|
|
|
|
|
|
|
|
|
|
Long-term debt, current |
1,073,000
|
|
|
|
2,014,000
|
|
|
|
|
|
|
|
1,073,000
|
|
1,073,000
|
|
1,073,000
|
1,073,000
|
|
|
|
|
|
|
|
|
|
Non-cash interest expense - related parties |
|
|
|
|
|
|
|
|
|
|
|
|
53,000
|
$ 178,000
|
136,000
|
$ 387,000
|
|
|
|
|
|
|
|
|
|
|
|
Equipment financing facility | Line of Credit |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Carrying Value |
$ 1,073,000
|
|
|
|
2,385,000
|
|
|
|
|
|
|
|
$ 1,073,000
|
|
$ 1,073,000
|
|
$ 1,073,000
|
1,073,000
|
|
|
|
|
|
|
|
|
|
Maximum borrowing capacity |
|
|
|
|
|
|
|
|
|
|
|
$ 25,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Proceeds from long-term lines of credit |
|
|
|
|
|
|
|
|
|
|
$ (4,216,000)
|
$ (7,000,000)
|
|
|
|
|
|
$ (11,216,000)
|
|
|
|
|
|
|
|
|
|
2025 Convertible Notes | Convertible Notes |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Debt Instrument [Line Items] |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Principal amount |
|
225,000,000
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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Debt instrument, option payment amounts |
|
$ 25,000,000
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Stated interest rate |
6.75%
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6.75%
|
|
6.75%
|
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6.75%
|
6.75%
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|
Threshold percentage of stock price trigger |
|
130.00%
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Threshold consecutive trading days | tradingDay |
|
20
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Trading days | tradingDay |
|
30
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Sale price of common stock period |
|
10 days
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Sale price of common stock |
|
98.00%
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|
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Conversion price per unit (in dollars per share) | $ / shares |
|
$ 5.10
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Excess stock price threshold |
|
130.00%
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Aggregate principal amount |
|
$ 75,000,000
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Carrying Value |
$ 239,251,000
|
$ 215,126,000
|
|
|
$ 0
|
|
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$ 239,251,000
|
|
$ 239,251,000
|
|
$ 239,251,000
|
$ 239,251,000
|
$ 239,126,000
|
$ 227,126,000
|
|
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Interest payable |
$ 1,223,000
|
|
|
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1,223,000
|
|
1,223,000
|
|
$ 1,223,000
|
$ 1,223,000
|
|
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Non-cash interest expense - related parties |
|
|
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$ 1,348,000
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|
$ 1,348,000
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|
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Delayed Draw Term Loan (DDTL), Initial Draw | Secured Debt |
|
|
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Debt Instrument [Line Items] |
|
|
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|
Principal amount |
|
|
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|
$ 75,000,000
|
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Proceeds from issuance of secured debt |
|
|
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70,075,000
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Proceeds from issuance of unsecured debt, net of original issue discount |
|
|
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$ 71,250,000
|
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Modification of the DDTL |
|
|
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|
Debt Instrument [Line Items] |
|
|
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|
Change in fair value of debt - credit risk - related party |
|
|
16,245,000
|
|
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Accumulated other comprehensive income (loss) |
|
|
50,000,000
|
|
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Loss (gain) on debt extinguishment |
|
|
38,375,000
|
|
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|
Change in fair value of debt - credit risk - related party |
|
|
$ (16,245,000)
|
|
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