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Goodwill and Other Identifiable Intangible Assets - Schedule of Amortization Expense for Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Finite Lived Intangible Assets [Line Items] |  |  |
Amortization expense for intangible assets | $ 9,004 | $ 4,160 | $ 1,265
Research and Development Expense |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Amortization expense for intangible assets | 7,800 | 2,914 |
Sales and Marketing Expense |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Amortization expense for intangible assets | 204 | 175 | 144
General and Administrative Expense |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Amortization expense for intangible assets | $ 1,000 | $ 1,071 | $ 1,121

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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