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Fair Value Measurements - Summary of Change in Fair Value of Derivative Warrant Liabilities (Details)	3 Months Ended
	Mar. 31, 2021 USD ($)
Fair Value Disclosures [Abstract]
Beginning balance of derivative warrant liabilities	$ 21,354,400
Change in fair value of derivative warrant liabilities	(9,480,870)
Ending balance of Derivative warrant liabilities	$ 11,873,530

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- Definition

Derivative warrant liabilities.

+ References

No definition available.

+ Details

Name:	stwou_DerivativeWarrantLiabilities
Namespace Prefix:	stwou_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of expense (income) related to adjustment to fair value of warrant liability.

+ 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 480
-SubTopic 10
-Section 25
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=109262497&loc=d3e20148-110875

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration