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v3.21.2

Commitments and Contingencies (Details) | Sep. 30, 2021 USD ($) entity | Dec. 31, 2020 USD ($)
--- | --- | ---
Debt Instrument [Line Items] |  |
Restricted cash, short term | $ 6,000,000.0 | $ 5,000,000.0
Restricted cash, long-term | 10,000,000 | 5,000,000
Related Party Transaction [Line Items] |  |
Accrued payroll and related liabilities | 4,498,000 | 3,257,000
Retention Agreements |  |
Related Party Transaction [Line Items] |  |
Accrued payroll and related liabilities | $ 800,000 |
Tinuum Group, LLC |  |
Related Party Transaction [Line Items] |  |
Number of entities affiliated with related parties | entity | 2 |
Limited guarantees, percent | 50.00% |
Liabilities or expense | $ 0 |
Surety Agreement |  |
Debt Instrument [Line Items] |  |
Restricted cash, long-term | $ 10,000,000 | $ 5,000,000

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