Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands		12 Months Ended
	Mar. 27, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Adjustable taxable income deductible net interest percentage	30.00%	50.00%
U.S. statutory federal corporate tax rate		21.00%			35.00%
Operating loss carryforwards		$ 258,790
Net operating loss carryforward expiration year		2028
Net operating loss carryforward expiration period		20 years
Unrecognized tax benefits		$ 0	$ 86	$ 0
Decrease in unrecognized tax benefits is reasonably possible		86
Increase in unrecognized tax benefits is reasonably possible			86
Interest and penalty expenses related to uncertain tax positions		0	0	$ 0
Accrued interest and penalties on unrecognized tax positions		$ 0	0
Canada [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Open tax year		2016
Germany [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Open tax year		2016
Australia [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Open tax year		2017
United States [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Open tax year		2018
Deferred Tax Asset, Valuation Allowance [Member]
Operating Loss Carryforwards [Line Items]
Increase in deferred tax valuation allowance		$ 65,318	$ 66,355
United States [Member]
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards offset percentage of taxable income	100.00%	80.00%
Operating loss carryforwards		$ 135,817
Portugal [Member] | Earliest Tax Year [Member]
Operating Loss Carryforwards [Line Items]
Open tax year		2017