The aggregate cost of goods produced and sold and services rendered during the reporting period.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Unaudited Quarterly Financial data and Restatement of Previously Issued Unaudited interim Condensed Consolidated Financial Statements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended							6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Right of use assets obtained in exchange for new operating lease liabilities												$ 58,500	$ 37,700
Research and development	$ 7,386	$ 4,873	$ 4,774	$ 4,882	$ 3,563	$ 3,608	$ 3,006	$ 9,647	$ 6,614	$ 17,033	$ 10,177	$ 27,848	15,059	$ 12,750
As previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Research and development	11,964	9,757	10,412	9,341	8,028	8,933	7,373	20,169	16,306	32,133	24,334		33,675	33,907
Restatement Adjustments
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Research and development	$ (4,578)	$ (4,884)	$ (5,638)	$ (4,459)	$ (4,465)	$ (5,325)	$ (4,367)	$ (10,522)	$ (9,692)	$ (15,100)	$ (14,157)		(18,616)	(21,157)
Cost of Revenue													$ 19,492	$ 21,157