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Investments - Schedule of Non-Marketable Equity Investments (Details) - USD ($) $ in Thousands	Jul. 31, 2021	Jan. 31, 2021
Investments, Debt and Equity Securities [Abstract]
Total initial cost	$ 105,819	$ 65,377
Cumulative net unrealized gains (losses)	19,256	7,765
Carrying value	$ 125,075	$ 73,142

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- Definition

Amount of investment in equity security without readily determinable fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123583765&loc=SL75117539-209714

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- Definition

Equity Securities without Readily Determinable Fair Value, Cost

+ References

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- Definition

Equity Securities without Readily Determinable Fair Value, Cumulative Unrealized Gain (Loss)

+ References

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