<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.21.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>140</ContextCount>
  <ElementCount>301</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>33</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>5</UnitCount>
  <MyReports>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>100090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>100100 - Statement - BALANCE SHEET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementBalanceSheet</Role>
      <ShortName>BALANCE SHEET</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>100105 - Statement - BALANCE SHEET (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementBalanceSheetParenthetical</Role>
      <ShortName>BALANCE SHEET (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>100200 - Statement - STATEMENT OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementStatementOfOperations</Role>
      <ShortName>STATEMENT OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>100300 - Statement - STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementStatementOfChangesInShareholdersEquity</Role>
      <ShortName>STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>100400 - Statement - STATEMENT OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementStatementOfCashFlows</Role>
      <ShortName>STATEMENT OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>110101 - Disclosure - DESCRIPTION OF ORGANIZATION, BUSINESS OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureDescriptionOfOrganizationBusinessOperations</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION, BUSINESS OPERATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>110201 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRestatementOfPreviouslyIssuedFinancialStatements</Role>
      <ShortName>RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>110301 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureSummaryOfSignificantAccountingPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>110401 - Disclosure - INITIAL PUBLIC OFFERING</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureInitialPublicOffering</Role>
      <ShortName>INITIAL PUBLIC OFFERING</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>110501 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRelatedPartyTransactions</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>110601 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>110701 - Disclosure - DERIVATIVE WARRANT LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureDerivativeWarrantLiabilities</Role>
      <ShortName>DERIVATIVE WARRANT LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>110801 - Disclosure - SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureShareholdersEquity</Role>
      <ShortName>SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>110901 - Disclosure - FAIR VALUE MEASUREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>FAIR VALUE MEASUREMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>111001 - Disclosure - Quarterly Financial Information (Unaudited)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureQuarterlyFinancialInformationUnaudited</Role>
      <ShortName>Quarterly Financial Information (Unaudited)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>111101 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>120302 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>130203 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRestatementOfPreviouslyIssuedFinancialStatementsTables</Role>
      <ShortName>RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureRestatementOfPreviouslyIssuedFinancialStatements</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>130903 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>131003 - Disclosure - Quarterly Financial Information (Unaudited) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureQuarterlyFinancialInformationUnauditedTables</Role>
      <ShortName>Quarterly Financial Information (Unaudited) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureQuarterlyFinancialInformationUnaudited</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>140101 - Disclosure - DESCRIPTION OF ORGANIZATION, BUSINESS OPERATIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureDescriptionOfOrganizationBusinessOperationsDetails</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION, BUSINESS OPERATIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureDescriptionOfOrganizationBusinessOperations</ParentRole>
      <Position>22</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>140201 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Balance Sheets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRestatementOfPreviouslyIssuedFinancialStatementsBalanceSheetsDetails</Role>
      <ShortName>RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Balance Sheets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>140202 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Statements of operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRestatementOfPreviouslyIssuedFinancialStatementsStatementsOfOperationsDetails</Role>
      <ShortName>RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Statements of operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>140203 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Statements of cash flows (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRestatementOfPreviouslyIssuedFinancialStatementsStatementsOfCashFlowsDetails</Role>
      <ShortName>RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Statements of cash flows (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>140204 - Disclosure - RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRestatementOfPreviouslyIssuedFinancialStatementsAdditionalInformationDetails</Role>
      <ShortName>RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>140301 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>140401 - Disclosure - INITIAL PUBLIC OFFERING (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureInitialPublicOfferingDetails</Role>
      <ShortName>INITIAL PUBLIC OFFERING (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureInitialPublicOffering</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>140501 - Disclosure - RELATED PARTY TRANSACTIONS - Founder Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRelatedPartyTransactionsFounderSharesDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS - Founder Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>140502 - Disclosure - RELATED PARTY TRANSACTIONS - Private Placement Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRelatedPartyTransactionsPrivatePlacementWarrantsDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS - Private Placement Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>140503 - Disclosure - RELATED PARTY TRANSACTIONS - Working Capital and Support (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRelatedPartyTransactionsWorkingCapitalAndSupportDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS - Working Capital and Support (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>140601 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureCommitmentsAndContingenciesDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>140701 - Disclosure - DERIVATIVE WARRANT LIABILITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureDerivativeWarrantLiabilitiesDetails</Role>
      <ShortName>DERIVATIVE WARRANT LIABILITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureDerivativeWarrantLiabilities</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>140801 - Disclosure - SHAREHOLDERS' EQUITY - Preference Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureShareholdersEquityPreferenceSharesDetails</Role>
      <ShortName>SHAREHOLDERS' EQUITY - Preference Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>140802 - Disclosure - SHAREHOLDERS' EQUITY - Ordinary Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureShareholdersEquityOrdinarySharesDetails</Role>
      <ShortName>SHAREHOLDERS' EQUITY - Ordinary Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>35</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>140901 - Disclosure - FAIR VALUE MEASUREMENTS - Financial Assets Measured at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsFinancialAssetsMeasuredAtFairValueDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Financial Assets Measured at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>36</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>140902 - Disclosure - FAIR VALUE MEASUREMENTS - Quantitative Information Regarding Level 3 Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsQuantitativeInformationRegardingLevel3FairValueMeasurementsDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Quantitative Information Regarding Level 3 Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>37</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>140903 - Disclosure - FAIR VALUE MEASUREMENTS - Change in Fair Value of Level 3 Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsChangeInFairValueOfLevel3FairValueMeasurementsDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Change in Fair Value of Level 3 Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>140904 - Disclosure - FAIR VALUE MEASUREMENTS - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsAdditionalInformationDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>39</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>141001 - Disclosure - Quarterly Financial Information (Unaudited) - Balance Sheet (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureQuarterlyFinancialInformationUnauditedBalanceSheetDetails</Role>
      <ShortName>Quarterly Financial Information (Unaudited) - Balance Sheet (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureQuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>141002 - Disclosure - Quarterly Financial Information (Unaudited) - Condensed Statement of Operations (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureQuarterlyFinancialInformationUnauditedCondensedStatementOfOperationsDetails</Role>
      <ShortName>Quarterly Financial Information (Unaudited) - Condensed Statement of Operations (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureQuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>141003 - Disclosure - Quarterly Financial Information (Unaudited) - Condensed Statement of Cash Flows (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureQuarterlyFinancialInformationUnauditedCondensedStatementOfCashFlowsDetails</Role>
      <ShortName>Quarterly Financial Information (Unaudited) - Condensed Statement of Cash Flows (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureQuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>141101 - Disclosure - SUBSEQUENT EVENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureSubsequentEventsDetails</Role>
      <ShortName>SUBSEQUENT EVENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureSubsequentEvents</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>200100 - Statement - BALANCE SHEET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementBalanceSheets</Role>
      <ShortName>BALANCE SHEET</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>200105 - Statement - BALANCE SHEET (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementBalanceSheetParentheticals</Role>
      <ShortName>BALANCE SHEET (Parenthetical)</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>200200 - Statement - STATEMENT OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementStatementOfOperationss</Role>
      <ShortName>STATEMENT OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>200300 - Statement - STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementStatementOfChangesInShareholdersEquitys</Role>
      <ShortName>STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>200400 - Statement - STATEMENT OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/StatementStatementOfCashFlowss</Role>
      <ShortName>STATEMENT OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>48</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>210101 - Disclosure - DESCRIPTION OF ORGANIZATION, BUSINESS OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureDescriptionOfOrganizationBusinessOperationss</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION, BUSINESS OPERATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>210201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureSummaryOfSignificantAccountingPoliciess</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>210301 - Disclosure - INITIAL PUBLIC OFFERING</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureInitialPublicOfferings</Role>
      <ShortName>INITIAL PUBLIC OFFERING</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>210401 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRelatedPartyTransactionss</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>52</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>210501 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureCommitmentsAndContingenciess</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>210601 - Disclosure - DERIVATIVE WARRANT LIABILITIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureDerivativeWarrantLiabilitiess</Role>
      <ShortName>DERIVATIVE WARRANT LIABILITIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>210701 - Disclosure - SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureShareholdersEquitys</Role>
      <ShortName>SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>55</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>210801 - Disclosure - FAIR VALUE MEASUREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementss</Role>
      <ShortName>FAIR VALUE MEASUREMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>56</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>210901 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureSubsequentEventss</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>220202 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPoliciess</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>58</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>230803 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsTabless</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>240101 - Disclosure - DESCRIPTION OF ORGANIZATION, BUSINESS OPERATIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureDescriptionOfOrganizationBusinessOperationsDetailss</Role>
      <ShortName>DESCRIPTION OF ORGANIZATION, BUSINESS OPERATIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureDescriptionOfOrganizationBusinessOperations</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>240201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureSummaryOfSignificantAccountingPoliciesDetailss</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>240301 - Disclosure - INITIAL PUBLIC OFFERING (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureInitialPublicOfferingDetailss</Role>
      <ShortName>INITIAL PUBLIC OFFERING (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureInitialPublicOffering</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>240401 - Disclosure - RELATED PARTY TRANSACTIONS - Founder Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRelatedPartyTransactionsFounderSharesDetailss</Role>
      <ShortName>RELATED PARTY TRANSACTIONS - Founder Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>240402 - Disclosure - RELATED PARTY TRANSACTIONS - Private Placement Warrants (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRelatedPartyTransactionsPrivatePlacementWarrantsDetailss</Role>
      <ShortName>RELATED PARTY TRANSACTIONS - Private Placement Warrants (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>240403 - Disclosure - RELATED PARTY TRANSACTIONS - Working Capital and Support (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureRelatedPartyTransactionsWorkingCapitalAndSupportDetailss</Role>
      <ShortName>RELATED PARTY TRANSACTIONS - Working Capital and Support (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>240501 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureCommitmentsAndContingenciesDetailss</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>240601 - Disclosure - DERIVATIVE WARRANT LIABILITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureDerivativeWarrantLiabilitiesDetailss</Role>
      <ShortName>DERIVATIVE WARRANT LIABILITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.aone.com/role/DisclosureDerivativeWarrantLiabilities</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>240701 - Disclosure - SHAREHOLDERS' EQUITY - Preference Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureShareholdersEquityPreferenceSharesDetailss</Role>
      <ShortName>SHAREHOLDERS' EQUITY - Preference Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>240702 - Disclosure - SHAREHOLDERS' EQUITY - Ordinary Shares (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureShareholdersEquityOrdinarySharesDetailss</Role>
      <ShortName>SHAREHOLDERS' EQUITY - Ordinary Shares (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>240801 - Disclosure - FAIR VALUE MEASUREMENTS - Financial Assets Measured at Fair Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsFinancialAssetsMeasuredAtFairValueDetailss</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Financial Assets Measured at Fair Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>240802 - Disclosure - FAIR VALUE MEASUREMENTS - Quantitative Information Regarding Level 3 Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsQuantitativeInformationRegardingLevel3FairValueMeasurementsDetailss</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Quantitative Information Regarding Level 3 Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>240803 - Disclosure - FAIR VALUE MEASUREMENTS - Change in Fair Value of Level 3 Fair Value Measurements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsChangeInFairValueOfLevel3FairValueMeasurementsDetailss</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Change in Fair Value of Level 3 Fair Value Measurements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="aone-20210604.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>240804 - Disclosure - FAIR VALUE MEASUREMENTS - Additional Information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.aone.com/role/DisclosureFairValueMeasurementsAdditionalInformationDetailss</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Additional Information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>aone-20210604.xml</File>
    <File>aone-20210604.xsd</File>
    <File>aone-20210604_cal.xml</File>
    <File>aone-20210604_def.xml</File>
    <File>aone-20210604_lab.xml</File>
    <File>aone-20210604_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/us-gaap/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2020-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2020-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
