Additions made to capitalized computer software costs during the 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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Identifiable Intangible Assets and Goodwill - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) reporting_unit	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items]
Research and development	$ 10,122	$ 4,210	$ 24,574	$ 13,613
Capitalized software development costs	1,600	2,400	$ 9,100	6,700
Number of operating segments \| reporting_unit			2
Number of reportable segments \| reporting_unit			2
Acquired developed technology
Finite-Lived Intangible Assets [Line Items]
Amortization of capitalized software development costs	3,700	900	$ 8,300	2,600
Internally Developed Software Costs Not Meeting General Release Threshold
Finite-Lived Intangible Assets [Line Items]
Research and development			3,000		$ 6,500
Internally developed software costs
Finite-Lived Intangible Assets [Line Items]
Amortization of capitalized software development costs	$ 1,300	$ 800	$ 3,800	$ 2,300
Minimum
Finite-Lived Intangible Assets [Line Items]
Useful life			3 years
Minimum \| Acquired developed technology
Finite-Lived Intangible Assets [Line Items]
Useful life			3 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Useful life			7 years
Maximum \| Acquired developed technology
Finite-Lived Intangible Assets [Line Items]
Useful life			7 years