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Stockholders' Equity - Additional Information (Detail) |  |  |  |  |  | 1 Months Ended | 3 Months Ended | 8 Months Ended | 15 Months Ended | 24 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Mar. 04, 2024 USD ($) $ / shares shares | Jul. 26, 2023 USD ($) | Apr. 03, 2023 USD ($) $ / shares shares | Mar. 18, 2022 USD ($) | Jul. 28, 2021 | Oct. 31, 2015 shares | May 31, 2015 USD ($) Tranche $ / shares shares | Feb. 28, 2014 Tranche $ / shares shares | Mar. 31, 2024 USD ($) $ / shares shares | Mar. 31, 2023 USD ($) shares | Mar. 31, 2024 $ / shares shares | Dec. 31, 2016 USD ($) | Mar. 18, 2024 shares | Jul. 31, 2023 USD ($) shares | Dec. 31, 2023 $ / shares shares | Feb. 20, 2014 USD ($)
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Preferred stock, shares authorized |  |  |  |  |  |  |  |  | 10,000,000 |  | 10,000,000 |  |  |  | 10,000,000 |
Preferred stock, par value | $ / shares |  |  |  |  |  |  |  |  | $ 0.00001 |  | $ 0.00001 |  |  |  | $ 0.00001 |
Preferred stock, shares outstanding |  |  |  |  |  |  |  |  | 0 |  | 0 |  |  |  | 0 |
Common stock, shares authorized |  |  |  |  |  |  |  |  | 300,000,000 |  | 300,000,000 |  |  |  | 300,000,000 |
Common stock, par value | $ / shares |  |  |  |  |  |  |  |  | $ 0.00001 |  | $ 0.00001 |  |  |  | $ 0.00001 |
Number of common stock for issuance in exchange for future services from founders |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |
Common stock price per share | $ / shares |  |  |  |  |  |  |  | $ 0.01 |  |  |  |  |  |  |  |
Number of tranches | Tranche |  |  |  |  |  |  | 2 | 2 |  |  |  |  |  |  |  |
Unrecognized compensation expense | $ |  |  |  |  |  |  | $ 62,000 |  |  |  |  |  |  |  |  | $ 168,000
Common stock shares repurchased |  |  |  |  |  |  | 633,810 |  |  |  |  |  |  |  |  |
Repurchase of common stock from stockholders, per share | $ / shares |  |  |  |  |  |  | $ 0.00001 |  |  |  |  |  |  |  |  |
Remaining number of repurchased shares |  |  |  |  |  |  | 366,190 |  |  |  |  |  |  |  |  |
Shares issued under ESPP |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |
Performance Shares [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares vested |  |  |  |  |  | 183,095 |  |  |  |  |  |  |  |  |  |
ATM Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross proceeds from common stock issuance | $ |  | $ 151,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock sold |  |  |  |  |  |  |  |  |  |  | 1,426,303 |  |  |  |  |
Shelf registration statement expiry date |  | Jul. 26, 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |
April 2023 Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock sold |  |  | 19,828,300 |  |  |  |  |  |  |  |  |  |  |  |  |
Offering price per share | $ / shares |  |  | $ 14.5 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, shares issued |  |  | 2,586,300 |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock net | $ |  |  | $ 270,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
March 2024 Offering [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock sold | 7,441,650 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Offering price per share | $ / shares | $ 85 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, shares issued | 970,650 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury shares sold | 2,193,251 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock net | $ | $ 597,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common Stock [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock sold |  |  |  |  |  |  |  |  | 8,867,953 | 178,204 |  |  |  |  |  |
Common Stock [Member] | ATM Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Common stock sold |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,587,404 |  |
Shelf registration statement expiry period |  |  |  |  | 2023-07 |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of common stock net | $ |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13,600,000 |  |
Repurchase Program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Repurchase of common stock (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 729,034 |  |  |
Stock repurchase program, additional maturity period |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, termination date |  |  |  | Mar. 18, 2024 |  |  |  |  |  |  |  |  |  |  |  |
Maximum [Member] | Repurchase Program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase of common stock and warrants | $ |  |  |  | $ 50,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Tranche One [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock for issuance in exchange for future services from founders |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |
Remaining number of repurchased shares |  |  |  |  |  |  | 183,095 |  |  |  |  |  |  |  |  |
Stock compensation expense | $ |  |  |  |  |  |  |  |  | $ 0 | $ 0 |  | $ 31,000 |  |  |  |
Tranche Two [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of common stock for issuance in exchange for future services from founders |  |  |  |  |  |  |  | 500,000 |  |  |  |  |  |  |  |
Remaining number of repurchased shares |  |  |  |  |  |  | 183,095 |  |  |  |  |  |  |  |  |

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- Definition Shares repurchase price per share. + References No definition available. + Details
Name: | vktx_SharesRepurchasePricePerShare
Namespace Prefix: | vktx_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shelf registration statement expiry date. + References No definition available. + Details
Name: | vktx_ShelfRegistrationStatementExpiryDate
Namespace Prefix: | vktx_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Shelf registration statement, expiry month and year. + References No definition available. + Details
Name: | vktx_ShelfRegistrationStatementExpiryMonthAndYear
Namespace Prefix: | vktx_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stock repurchase program, extended maturity period. + References No definition available. + Details
Name: | vktx_StockRepurchaseProgramExtendedMaturityPeriod
Namespace Prefix: | vktx_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=vktx_AtTheMarketEquityOfferingSalesAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=vktx_April2023OfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=vktx_March2024OfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
Name: | us-gaap_TypeOfArrangementAxis=vktx_RepurchaseProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheOneMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_VestingAxis=us-gaap_ShareBasedCompensationAwardTrancheTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |