Debt - Schedule of Debt (Details) - USD ($) $ in Thousands  | 
Sep. 30, 2023  | 
Dec. 31, 2022  | 
|---|---|---|
| Debt Instrument [Line Items] | ||
| Total debt | $ 70,791 | $ 61,195 | 
| Debt, current | 0 | (575) | 
| Debt, noncurrent | 70,791 | 60,620 | 
| Structural Lenders | Structural Debt Facility | ||
| Debt Instrument [Line Items] | ||
| Other long-term debt | 63,291 | 60,620 | 
| Siena Lending Group, LLC | Siena Revolver | ||
| Debt Instrument [Line Items] | ||
| Other long-term debt | 7,500 | 0 | 
| Atel | Atel Loan Facility Draw 3 | ||
| Debt Instrument [Line Items] | ||
| Other long-term debt | 0 | 480 | 
| Atel | Atel Loan Facility Draw 4 | ||
| Debt Instrument [Line Items] | ||
| Other long-term debt | $ 0 | $ 95 | 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as current. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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