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Common, Preferred Stock and Warrants - Activity (Details) | 3 Months Ended
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Mar. 31, 2024 $ / shares shares
Common, Preferred Stock and Warrants |
Warrants Outstanding, beginning (in shares) | 6,307,193
Warrants outstanding, ending (in shares) | 4,519,750
Weighted Average Exercise Price, outstanding at the beginning of period | $ / shares | 2.42
Weighted Average Exercise Price, outstanding at the end of period | $ / shares | 3.35
Warrants |
Common, Preferred Stock and Warrants |
Warrants outstanding, ending (in shares) | 4,519,750
Weighted Average Exercise Price, outstanding at the end of period | $ / shares | 3.35
Pre Funded Warrants |
Common, Preferred Stock and Warrants |
Warrants Exercised (in shares) | (1,756,062)
Public Warrants |
Common, Preferred Stock and Warrants |
Warrants Exercised (in shares) | (31,381)
Weighted Average Exercise Price, warrants exercised during the period | $ / shares | 2.75

X
- Definition Number of warrants exercised. + References No definition available. + Details
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Namespace Prefix: | ganx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average price at which warrant holders acquired shares when converting their warrants into shares + References No definition available. + Details
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Namespace Prefix: | ganx_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted Average exercise price of warrants. + References No definition available. + Details
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Namespace Prefix: | ganx_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- 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
Name: | us-gaap_ClassOfWarrantOrRightLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=ganx_PublicWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |