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            <identifier scheme="http://www.sec.gov/CIK">0001638287</identifier>
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            <startDate>2026-06-02</startDate>
            <endDate>2026-06-02</endDate>
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        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001638287</identifier>
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            <startDate>2026-06-02</startDate>
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    <unit id="USD">
        <measure>iso4217:USD</measure>
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    <unit id="pure">
        <measure>pure</measure>
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    <unit id="Shares">
        <measure>shares</measure>
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    <ffd:FormTp contextRef="rc" id="ixv-168">S-8</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-169">S-8</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-170">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-171">0001638287</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-172">MetaVia Inc.</dei:EntityRegistrantName>
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    <ffd:FormTp contextRef="rc" id="ixv-200">S-8</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-201">MetaVia Inc.</dei:EntityRegistrantName>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-202">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-203">Common Stock, par value $0.001 per share</ffd:OfferingSctyTitl>
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      contextRef="offrl_1"
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      unitRef="USD">2.84715</ffd:MaxOfferingPricPerScty>
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      contextRef="offrl_1"
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      contextRef="offrl_1"
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    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-211" unitRef="USD">78.64</ffd:TtlFeeAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-212" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-213" unitRef="USD">78.64</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-214">1a. Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as amended (the "Securities Act"), this Registration Statement on Form S-8 (the "Registration Statement") shall also cover any additional shares of common stock, par value $0.001 per share (the "Common Stock"), that become issuable under the plan set forth herein by reason of any stock dividend, stock split, recapitalization, or other similar transaction effected that results in an increase to the number of outstanding shares of MetaVia Inc. (the "Registrant") Common Stock.

1b. Represents additional shares of Common Stock to be registered and available for grant under the Registrant's Amended and Restated 2022 Equity Incentive Plan (the "2022 Incentive Plan"). These additional shares of Common Stock were reserved for issuance in connection with the amendment to the 2022 Incentive Plan, which was approved by stockholders on June 8, 2026 at the Company's 2026 Annual Meeting of Stockholders.

1c. Estimated pursuant to Rules 457(c) and 457(h) under the Securities Act, solely for the purposes of calculating the registration fee and based on the average of the high and low prices of the Registrant's Common Stock as reported on the Nasdaq Capital Market on June 1, 2026, which date is within five business days prior to the filing of this Registration Statement. 

1d. The Registrant does not have any fee offsets.
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