Condensed Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Stock based compensation expense	$ 16,835	$ 672	$ 11,296	$ 35,972
Cost of revenue
Stock based compensation expense	1		2	9
Selling and marketing
Stock based compensation expense	2,082	50	1,901	477
Product and technology
Stock based compensation expense	2,317	399	5,248	747
General and administrative
Stock based compensation expense	$ 12,435	$ 223	$ 4,145	$ 34,739

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
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-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
-Paragraph 1
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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