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Commitments and Contingencies - Additional Information (Details) | 1 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 30, 2020 lawsuits | Nov. 30, 2018 fatality | Jun. 26, 2022 USD ($) facility | Jun. 26, 2022 GBP (£) facility | Dec. 31, 2021 USD ($) | Dec. 31, 2021 GBP (£) | Jun. 26, 2022 GBP (£)
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of bonding facilities for bank guarantees | facility |  |  | 2 | 2 |  |  |
Amount drawn/utilized |  |  | $ 18,100,000 |  |  |  |
Borrowing capacity |  |  | 4,000,000 |  |  |  |
Credit facility, amount drawn |  |  | $ 0 |  | $ 0 |  |
Number of fatalities | fatality |  | 1 |  |  |  |  |
Number of lawsuits | lawsuits | 3 |  |  |  |  |  |
Lawsuit by third-party disposal company | lawsuits | 1 |  |  |  |  |  |
Lawsuit by estate of the decedent | lawsuits | 1 |  |  |  |  |  |
Lawsuit by injured employee | lawsuits | 1 |  |  |  |  |  |
United Kingdom, Pounds |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of bonding facilities for bank guarantees | facility |  |  | 1 | 1 |  |  |
United States of America, Dollars |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Number of bonding facilities for bank guarantees | facility |  |  | 1 | 1 |  |  |
Revolving credit facility |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Long-term debt, gross |  |  | $ 26,800,000 |  | 10,800,000 |  |
Uncommitted accordion facility |  |  | 50,000,000 |  |  |  |
Borrowing capacity |  |  | 73,200,000 |  |  |  |
Committed banking facilities |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Debt maximum borrowing capacity |  |  | 100,000,000 |  | 100,000,000 |  |
Bonding facility for bank guarantees | United Kingdom, Pounds |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Debt maximum borrowing capacity |  |  | 600,000 |  | 900,000 |  | £ 500,000
Amount drawn/utilized |  |  | 100,000 | £ 100,000 | 200,000 | £ 100,000 |
Bonding facility for bank guarantees | United States of America, Dollars |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |
Debt maximum borrowing capacity |  |  | 900,000 |  | 1,500,000 |  |
Amount drawn/utilized |  |  | $ 900,000 |  | $ 900,000 |  |

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