v3.26.1

Common, Preferred Stock and Warrants - Activity (Details)	3 Months Ended
	Mar. 31, 2026 USD ($) $ / shares shares	Jul. 23, 2025	Jul. 17, 2025
Common, Preferred Stock and Warrants
Warrants Outstanding, beginning (in shares)	5,759,453
Warrants outstanding, ending (in shares)	5,267,652
Net proceeds from warrant exercises \| $	$ 2,063
Weighted average
Common, Preferred Stock and Warrants
Weighted Average Exercise Price, outstanding at the beginning of period \| $ / shares	$ 2.31
Weighted Average Exercise Price, outstanding at the end of period \| $ / shares	$ 2.37
Investor Warrants
Common, Preferred Stock and Warrants
Warrants Exercised (in shares)	(1,250)
Expected term (years)		2 years 6 months	2 years 6 months
Net proceeds from warrant exercises \| $	$ 2,000
Investor Warrants \| Weighted average
Common, Preferred Stock and Warrants
Weighted Average Exercise Price, warrants exercised during the period \| $ / shares	1.65
Agent warrants (a)
Common, Preferred Stock and Warrants
Warrants Exercised (in shares)	(490,551)
Shares issued on exercise of warrants	228,460
Warrants withheld and canceled	262,091
Agent warrants (a) \| Weighted average
Common, Preferred Stock and Warrants
Weighted Average Exercise Price, warrants exercised during the period \| $ / shares	1.69

Number of shares issued as a result of exercise of warrants.

+ References

No definition available.

+ Details

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

- Definition

The number of warrants exercised during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ganx_
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- Definition

The weighted average exercise price of warrants exercised during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ganx_
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- Definition

The number of warrants withheld and canceled during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	ganx_
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- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

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Balance Type:	na
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Number of warrants or rights outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the amount received from holders exercising their stock warrants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

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Period Type:	duration

- Definition

Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-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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Period Type:

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

Gain Therapeutics, Inc. 10-Q