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Goodwill and Acquired Intangible Assets - Summary of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items] |  |
Gross Amount | $ 3,870 | $ 3,870
Accumulated Amortization | (807) | (504)
Carrying Value | $ 3,063 | $ 3,366
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Useful Life | 5 years | 5 years
Gross Amount | $ 3,600 | $ 3,600
Accumulated Amortization | (735) | (464)
Carrying Value | $ 2,865 | $ 3,136
Other identifiable intangible assets [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Useful Life | 3 years 8 months 12 days | 3 years 8 months 12 days
Gross Amount | $ 270 | $ 270
Accumulated Amortization | (72) | (40)
Carrying Value | $ 198 | $ 230

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 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)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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