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        <period>
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            <endDate>2026-07-15</endDate>
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    <dei:AmendmentFlag contextRef="AsOf2026-07-15" id="Fact000003">true</dei:AmendmentFlag>
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    <dei:DocumentPeriodEndDate contextRef="AsOf2026-07-15" id="Fact000010">2026-07-15</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName contextRef="AsOf2026-07-15" id="Fact000011">Quantum Cyber N.V.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode contextRef="AsOf2026-07-15" id="Fact000012">P7</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber contextRef="AsOf2026-07-15" id="Fact000013">001-41010</dei:EntityFileNumber>
    <dei:EntityAddressAddressLine1 contextRef="AsOf2026-07-15" id="Fact000015">200 Connecticut Ave</dei:EntityAddressAddressLine1>
    <dei:EntityAddressAddressLine2 contextRef="AsOf2026-07-15" id="Fact000016">Suite 400</dei:EntityAddressAddressLine2>
    <dei:EntityAddressCityOrTown contextRef="AsOf2026-07-15" id="Fact000017">Norwalk</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince contextRef="AsOf2026-07-15" id="Fact000018">CT</dei:EntityAddressStateOrProvince>
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    <dei:PreCommencementTenderOffer contextRef="AsOf2026-07-15" id="Fact000024">false</dei:PreCommencementTenderOffer>
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    <dei:Security12bTitle contextRef="AsOf2026-07-15" id="Fact000026">Ordinary Shares, nominal value &#x20ac;0.01 per share</dei:Security12bTitle>
    <dei:TradingSymbol contextRef="AsOf2026-07-15" id="Fact000027">QUCY</dei:TradingSymbol>
    <dei:SecurityExchangeName contextRef="AsOf2026-07-15" id="Fact000028">NASDAQ</dei:SecurityExchangeName>
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    <dei:AmendmentDescription contextRef="AsOf2026-07-15" id="Fact000031">On July 16, 2026, Quantum Cyber N.V. (the &#x201c;Company&#x201d;)
filed a Current Report on Form 8-K (the &#x201c;Original Form 8-K&#x201d;) with the U.S. Securities and Exchange Commission (the &#x201c;SEC&#x201d;)
in connection with the completion of the Company&#x2019;s acquisition of (i) certain parcels of real property located at 38 Union Avenue,
Bridgeport, Connecticut from Arcade Realty LLC (&#x201c;Arcade Realty,&#x201d; and such acquisition, the &#x201c;Property Acquisition&#x201d;)
and (ii) certain assets of Arcade Technology LLC (&#x201c;Arcade Technology&#x201d;) used in Arcade Technology&#x2019;s business of providing
precision metal stamping services as well as tool design and manufacturing services (the &#x201c;Asset Acquisition,&#x201d; and together,
with the Property Acquisition, the &#x201c;Acquisition&#x201d;).</dei:AmendmentDescription>
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