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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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