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Intangible Assets (Details Narrative) - USD ($)	Sep. 30, 2021	Apr. 16, 2021	Dec. 31, 2020
Common shares issued, fair value	$ 12,281	$ 1,073,369	$ 6,241
Duke University [Member]
Common shares issued, fair value	$ 1,073,529

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- Definition

Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Details

Name:	us-gaap_RelatedPartyTransactionAxis=scwo_DukeUniversityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: