v3.25.3

Fair Value Measurements - Schedule of Warrants Outstanding and Fair Values (Details) - Level 3 - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025
Warrants Outstanding
Warrants outstanding, beginning balance (in shares)	390,000	390,000
Expired (in shares)	(222,000)	(222,000)
Warrants outstanding, ending balance (in shares)	168,000	168,000
Fair Value per Share
Fair value, beginning balance (in dollars per share)	$ 30.82	$ 20.79
Fair value, ending balance (in dollars per share)	$ 35.24	$ 35.24
Warrant liability
Warrant Liability Fair Value
Warrant liability, fair value, beginning balance	$ 12,018	$ 8,107
Change in fair value	(6,097)	(2,186)
Warrant liability, fair value, ending balance	$ 5,921	$ 5,921

Class Of Warrant Or Right Forfeited Or Expired In Period

+ References

No definition available.

+ Details

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Namespace Prefix:	snwv_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The fair value per share of warrant liability at respective valuation date.

+ References

No definition available.

+ Details

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Namespace Prefix:	snwv_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Fair Value Per Share

+ References

No definition available.

+ Details

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Namespace Prefix:	snwv_
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Balance Type:	na
Period Type:	duration

- Definition

Fair Value, Warrant Liability [Abstract]

+ References

No definition available.

+ Details

Name:	snwv_FairValueWarrantLiabilityAbstract
Namespace Prefix:	snwv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of warrants liability outstanding.

+ References

No definition available.

+ Details

Name:	snwv_WarrantLiabilityWarrantsOutstanding
Namespace Prefix:	snwv_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Warrants Outstanding

+ References

No definition available.

+ Details

Name:	snwv_WarrantsOutstandingAbstract
Namespace Prefix:	snwv_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase (decrease) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

+ Details

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

- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-3

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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- Details

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- Details

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SANUWAVE Health, Inc. 10-Q