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Income Taxes - Summary of Net Operating Loss Carryforwards (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)
Deferred tax assets, operating loss, and other carryforwards
Foreign and state, net operating loss (NOL) carryforwards	$ 119,459
Total NOL and Other Carryforwards	184,196
Canada province
Deferred tax assets, operating loss, and other carryforwards
Foreign and state, net operating loss (NOL) carryforwards	$ 47,310
Canada province | Earliest period
Deferred tax assets, operating loss, and other carryforwards
Operating loss carryforward expiration	2027
Canada province | Latest period
Deferred tax assets, operating loss, and other carryforwards
Operating loss carryforward expiration	2040
Foreign Tax Authority
Deferred tax assets, operating loss, and other carryforwards
Foreign and state, net operating loss (NOL) carryforwards	$ 7,323
U.S. states
Deferred tax assets, operating loss, and other carryforwards
Foreign and state, net operating loss (NOL) carryforwards	$ 9,615
U.S. states | Earliest period
Deferred tax assets, operating loss, and other carryforwards
Operating loss carryforward expiration	2021
U.S. states | Latest period
Deferred tax assets, operating loss, and other carryforwards
Operating loss carryforward expiration	2030
Canada
Deferred tax assets, operating loss, and other carryforwards
Foreign and state, net operating loss (NOL) carryforwards	$ 46,329
Canada | Earliest period
Deferred tax assets, operating loss, and other carryforwards
Operating loss carryforward expiration	2027
Canada | Latest period
Deferred tax assets, operating loss, and other carryforwards
Operating loss carryforward expiration	2040
United Kingdom
Deferred tax assets, operating loss, and other carryforwards
Foreign and state, net operating loss (NOL) carryforwards	$ 8,882
Other Carryforwards
Deferred tax assets, operating loss, and other carryforwards
Other deductible carryforwards	64,737
Other Carryforwards | Canada province
Deferred tax assets, operating loss, and other carryforwards
Other deductible carryforwards	29,415
Other Carryforwards | Canada (credit)
Deferred tax assets, operating loss, and other carryforwards
Other deductible carryforwards	$ 5,475
Other Carryforwards | Canada (credit) | Earliest period
Deferred tax assets, operating loss, and other carryforwards
Other Carryforwards, expiration date	2023
Other Carryforwards | Canada (credit) | Latest period
Deferred tax assets, operating loss, and other carryforwards
Other Carryforwards, expiration date	2040
Other Carryforwards | Canada
Deferred tax assets, operating loss, and other carryforwards
Other deductible carryforwards	$ 29,415
Capital Loss Carryforward
Deferred tax assets, operating loss, and other carryforwards
Other deductible carryforwards	$ 432

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Amount of operating loss and tax credit carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws.

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+ References

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