<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025/ffd-2025.xsd"
      xlink:type="simple"/>
    <context id="c_offering_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002125551</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-21</startDate>
            <endDate>2026-05-21</endDate>
        </period>
    </context>
    <context id="c_offering_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002125551</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-21</startDate>
            <endDate>2026-05-21</endDate>
        </period>
    </context>
    <context id="c_offering_3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002125551</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>3</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-21</startDate>
            <endDate>2026-05-21</endDate>
        </period>
    </context>
    <context id="c_offering_4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002125551</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>4</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-21</startDate>
            <endDate>2026-05-21</endDate>
        </period>
    </context>
    <context id="c_offering_5">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002125551</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>5</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-21</startDate>
            <endDate>2026-05-21</endDate>
        </period>
    </context>
    <context id="c_offering_6">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002125551</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>6</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-21</startDate>
            <endDate>2026-05-21</endDate>
        </period>
    </context>
    <context id="c_offering_7">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002125551</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>7</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-05-21</startDate>
            <endDate>2026-05-21</endDate>
        </period>
    </context>
    <context id="c_report">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002125551</identifier>
        </entity>
        <period>
            <startDate>2026-05-21</startDate>
            <endDate>2026-05-21</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="shares">
        <measure>shares</measure>
    </unit>
    <ffd:SubmissnTp contextRef="c_report" id="fee_001">S-1/A</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="c_report" id="fee_002">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="c_report" id="fee_003">0002125551</dei:EntityCentralIndexKey>
    <ffd:RegnFileNb contextRef="c_report" id="fee_004">333-294978</ffd:RegnFileNb>
    <ffd:OfferingTableNa contextRef="c_report" id="fee_005" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="c_report" id="fee_006">N/A</ffd:OffsetTableNa>
    <ffd:CombinedProspectusTableNa contextRef="c_report" id="fee_007">N/A</ffd:CombinedProspectusTableNa>
    <ffd:FormTp contextRef="c_report" id="fee_008">S-1</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="c_report" id="fee_009">Alpex Acquisition Corporation</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="c_offering_1" id="fee_010">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_1" id="fee_011">Other</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_1" id="fee_012">Redeemable warrants included as part of the units</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c_offering_1" id="fee_013">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_1"
      decimals="0"
      id="fee_014"
      unitRef="shares">11500000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_015"
      unitRef="USD">0.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_016"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_017"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_018"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_2" id="fee_019">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_2" id="fee_020">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_2" id="fee_021">Class A ordinary shares underlying rights included as part of units</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="c_offering_2" id="fee_022">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_2"
      decimals="0"
      id="fee_023"
      unitRef="shares">575000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_024"
      unitRef="USD">10.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_025"
      unitRef="USD">5750000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_026"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_027"
      unitRef="USD">794.08</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_3" id="fee_028">true</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_3" id="fee_029">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_3" id="fee_030">Units, each consisting of one class A ordinary share, $0.0001 par value and one right to acquire one-fifth of one class A ordinary share</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="c_offering_3" id="fee_031">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_3"
      decimals="0"
      id="fee_032"
      unitRef="shares">11500000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_033"
      unitRef="USD">10.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_034"
      unitRef="USD">115000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeAmt
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_035"
      unitRef="USD">15881.50</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_4" id="fee_036">true</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_4" id="fee_037">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_4" id="fee_038">Class A ordinary shares included as part of the units</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c_offering_4" id="fee_039">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_4"
      decimals="0"
      id="fee_040"
      unitRef="shares">11500000</ffd:AmtSctiesRegd>
    <ffd:FeeAmt
      contextRef="c_offering_4"
      decimals="INF"
      id="fee_041"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_5" id="fee_042">true</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_5" id="fee_043">Other</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_5" id="fee_044">Rights included as part of the units</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="c_offering_5" id="fee_045">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_5"
      decimals="0"
      id="fee_046"
      unitRef="shares">11500000</ffd:AmtSctiesRegd>
    <ffd:FeeAmt
      contextRef="c_offering_5"
      decimals="INF"
      id="fee_047"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_6" id="fee_048">true</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_6" id="fee_049">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_6" id="fee_050">Class A ordinary shares underlying rights included as part of units</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="c_offering_6" id="fee_051">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_6"
      decimals="0"
      id="fee_052"
      unitRef="shares">2300000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c_offering_6"
      decimals="INF"
      id="fee_053"
      unitRef="USD">10.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_6"
      decimals="INF"
      id="fee_054"
      unitRef="USD">23000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeAmt
      contextRef="c_offering_6"
      decimals="INF"
      id="fee_055"
      unitRef="USD">3176.30</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_7" id="fee_056">true</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_7" id="fee_057">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_7" id="fee_058">Representative Shares</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="c_offering_7" id="fee_059">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_7"
      decimals="0"
      id="fee_060"
      unitRef="shares">230000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c_offering_7"
      decimals="INF"
      id="fee_061"
      unitRef="USD">10.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_7"
      decimals="INF"
      id="fee_062"
      unitRef="USD">2300000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeAmt
      contextRef="c_offering_7"
      decimals="INF"
      id="fee_063"
      unitRef="USD">317.63</ffd:FeeAmt>
    <ffd:TtlOfferingAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_064"
      unitRef="USD">146050000.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_065"
      unitRef="USD">20169.51</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_066"
      unitRef="USD">19375.43</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_067"
      unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_068"
      unitRef="USD">794.08</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c_offering_1" id="fee_069">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.&lt;br/&gt;&lt;br/&gt;Pursuant to Rule 416(a), there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from stock splits, stock dividends or similar transactions.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_2" id="fee_070">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.&lt;br/&gt;&lt;br/&gt;Pursuant to Rule 416(a), there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from stock splits, stock dividends or similar transactions.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_3" id="fee_071">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.&lt;br/&gt;&lt;br/&gt;Representing 11,500,000 units including 10,000,000 units to be issued in the offering and up to 1,500,000 units which may be issued upon exercise of a 45-day option granted to the underwriters to cover over-allotments, if any, each consisting of one Class A ordinary share, one redeemable warrant, and one right to acquire one-fourth of one Class A ordinary share.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_4" id="fee_072">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.&lt;br/&gt;&lt;br/&gt;Pursuant to Rule 416(a), there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from stock splits, stock dividends or similar transactions.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_5" id="fee_073">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_6" id="fee_074">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.&lt;br/&gt;&lt;br/&gt;Pursuant to Rule 416(a), there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from stock splits, stock dividends or similar transactions.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_7" id="fee_075">Estimated solely for the purpose of calculating the registration fee pursuant to Rule 457(a) under the Securities Act.</ffd:OfferingNote>
</xbrl>
