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Percentage of tax benefit to be realised from uncertain tax position for recognition in the income statement.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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Amount of allowance for credit loss on accounts receivable, classified as current.

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Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of discretionary contributions made by an employer to a defined contribution plan.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Disclosure related to a new accounting pronouncement or a change in accounting principle, including the nature and reason for the change and the effect of the change on prior periods and the current period.

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Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.

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Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

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Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 22, 2017	Jan. 01, 2020
Accounts receivable	$ 156,932,000	$ 50,315,000
Allowance for doubtful accounts on trade receivables	0	0
Equity method investment impairment losses	0	0	$ 0
Impairment of long lived assets	0	0	0
Discretionary contribution to employee defined benefit plan	$ 0	$ 0	$ 0
Percentage of tax benefit to be realised from uncertain tax position for recognition in the income statement	50.00%
Corporate statutory tax rate	21.00%	21.00%	21.00%	35.00%
Operating lease right-of-use assets	$ 217,075,000
Operating lease liabilities	29,079,000
Operating lease liabilities, noncurrent	229,800,000
Emerging growth company gross revenue threshold	$ 1,070,000,000
Description of adoption of accounting policy	company status on December 31, 2020 as its annual gross revenue exceeded the EGC revenue criteria of $1.07 billion. As such the Company became subject to new accounting pronouncement effective dates for non-EGC’s
Accounting Standards Update 2016-02 [Member]
Operating lease right-of-use assets					$ 234,100,000
Operating lease liabilities					43,300,000
Operating lease liabilities, noncurrent					$ 237,200,000
Performance Based [Member] \| Restricted Stock Units (RSUs) [Member] \| Public Listing [Member]
Share based compensation by share based payment arrangement equity instruments other than options vesting period based on service		180 days
Other Assets [Member]
Capitalized software implementation costs	$ 4,000,000
Leasehold Improvements [Member]
Lease hold improvements estimated useful lives	five years
Accounts Receivable [Member] \| Customer A [Member]
Percentage Concentration		38.00%
Accounts Receivable [Member] \| Customer C [Member]
Percentage Concentration		21.00%
Accounts Receivable [Member] \| Customer G [Member]
Percentage Concentration	13.00%
Revenue Benchmark [Member] \| Customer F [Member]
Percentage Concentration	10.00%
Revenue Benchmark [Member] \| Customer D [Member]
Percentage Concentration		12.00%	15.00%
Minimum [Member]
Equity method investment ownership percentage	20.00%
Minimum [Member] \| Revenue Benchmark [Member]
Percentage Concentration	10.00%	10.00%	10.00%
Maximum [Member]
Equity method investment ownership percentage	50.00%
Maximum [Member] \| Accounts Receivable [Member]
Percentage Concentration	10.00%	10.00%