XML 118 R68.htm IDEA: XBRL DOCUMENT
v3.24.1

Net Loss per Share - Computation of Diluted Net Loss per Share Attributable to Common Stockholders (Details) - Legacy Korro [Member] - shares | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Antidilutive securities excluded from computation of earnings per share | 1,331,200 | 4,514,051
Outstanding Warrant [Member] |  |
Antidilutive securities excluded from computation of earnings per share | 8,049 | 8,049
Unvested Restricted Stock Units [Member] |  |
Antidilutive securities excluded from computation of earnings per share | 0 | 2,902
Outstanding Stock Options [Member] |  |
Antidilutive securities excluded from computation of earnings per share | 1,323,151 | 461,100
Series Seed Preferred Stock [Member] |  |
Antidilutive securities excluded from computation of earnings per share | 0 | 684,739
Series A Convertible Preferred Stock [Member] |  |
Antidilutive securities excluded from computation of earnings per share | 0 | 2,029,666
Series B-1 Preferred Stock [Member] |  |
Antidilutive securities excluded from computation of earnings per share | 0 | 1,104,178
Series B-2 Preferred Stock [Member] |  |
Antidilutive securities excluded from computation of earnings per share | 0 | 223,417

X
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=krro_LegacyKorroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=krro_UnvestedRestrictedStockUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=krro_OutstandingStockOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=krro_SeriesSeedPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_SeriesAPreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=krro_SeriesB1PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=krro_SeriesB2PreferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |