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Note 8 - Common Stock - Activity of Stock Purchase Warrants (Details) - $ / shares | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Outstanding, shares (in shares) |  |
Outstanding, weighted average exercise price (in dollars per share) | $ 0.03 |
Issued (in shares) | 57,348,383 |
Issued (in dollars per share) | $ 0.03 |
Exercised (in shares) |  |
Exercised, weighted average exercise price (in dollars per share) |  |
Forfeited or expired (in shares) |  |
Forfeited or expired, weighted average exercise price (in dollars per share) |  |
Outstanding, shares (in shares) | 57,348,383 |

X
- Definition Exercise price per share of warrants or rights exchanged during period. + References No definition available. + Details
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Namespace Prefix: | govx_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of warrants or rights exercised during period. + References No definition available. + Details
Name: | govx_ClassOfWarrantOrRightExercisedDuringPeriod
Namespace Prefix: | govx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of warrants or rights forfeited or expired during period. + References No definition available. + Details
Name: | govx_ClassOfWarrantOrRightForfeitedOrExpiredDuringPeriod
Namespace Prefix: | govx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share of warrants or rights forfeited or expired during period. + References No definition available. + Details
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Namespace Prefix: | govx_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
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Namespace Prefix: | govx_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share of warrants or rights issued during period. + References No definition available. + Details
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Namespace Prefix: | govx_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of warrants or rights outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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