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Revenue, Unearned Revenue and Unbilled Accounts Receivable (Details 1) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Revenue, Unearned Revenue and Unbilled Accounts Receivable |  |
Unearned revenue at beginning of the period | $ 130,000 | $ 200,109
Billings deferred | 197,683 | 58,000
Refundable deposit returned | (100,000) | 0
Recognition of prior unearned revenue | 0 | (128,109)
Unearned revenue at end of period | $ 227,683 | $ 130,000

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Namespace Prefix: | scwo_
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Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | scwo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | scwo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | scwo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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