<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.19.3</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>80</ContextCount>
  <ElementCount>230</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>29</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>4</UnitCount>
  <MyReports>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/StatementInterimCondensedConsolidatedBalanceSheets</Role>
      <ShortName>INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/StatementInterimCondensedConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>INTERIM CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - INTERIM CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/StatementInterimCondensedConsolidatedStatementsOfComprehensiveLoss</Role>
      <ShortName>INTERIM CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00300 - Statement - STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/StatementStatementsOfChangesInStockholdersEquity</Role>
      <ShortName>STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00400 - Statement - INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/StatementInterimCondensedConsolidatedStatementsOfCashFlows</Role>
      <ShortName>INTERIM CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>10101 - Disclosure - GENERAL</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureGeneral</Role>
      <ShortName>GENERAL</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>10201 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPolicies</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10301 - Disclosure - RESEARCH AND LICENSE AGREEMENT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureResearchAndLicenseAgreement</Role>
      <ShortName>RESEARCH AND LICENSE AGREEMENT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10401 - Disclosure - SHORT TERM INVESTMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureShortTermInvestments</Role>
      <ShortName>SHORT TERM INVESTMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10501 - Disclosure - PREPAID EXPENSES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosurePrepaidExpenses</Role>
      <ShortName>PREPAID EXPENSES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10601 - Disclosure - LEASES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureLeases</Role>
      <ShortName>LEASES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10701 - Disclosure - DEFERRED GRANT INCOME</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureDeferredGrantIncome</Role>
      <ShortName>DEFERRED GRANT INCOME</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10801 - Disclosure - STOCK CAPITAL</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureStockCapital</Role>
      <ShortName>STOCK CAPITAL</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>20202 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureSignificantAccountingPoliciesPolicies</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>30603 - Disclosure - LEASES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureLeasesTables</Role>
      <ShortName>LEASES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.brainstorm-cell.com/role/DisclosureLeases</ParentRole>
      <Position>16</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>30803 - Disclosure - STOCK CAPITAL (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureStockCapitalTables</Role>
      <ShortName>STOCK CAPITAL (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.brainstorm-cell.com/role/DisclosureStockCapital</ParentRole>
      <Position>17</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>40201 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureSignificantAccountingPoliciesDetails</Role>
      <ShortName>SIGNIFICANT ACCOUNTING POLICIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.brainstorm-cell.com/role/DisclosureSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>18</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>40301 - Disclosure - RESEARCH AND LICENSE AGREEMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureResearchAndLicenseAgreementDetails</Role>
      <ShortName>RESEARCH AND LICENSE AGREEMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.brainstorm-cell.com/role/DisclosureResearchAndLicenseAgreement</ParentRole>
      <Position>19</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>40401 - Disclosure - SHORT TERM INVESTMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureShortTermInvestmentsDetails</Role>
      <ShortName>SHORT TERM INVESTMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.brainstorm-cell.com/role/DisclosureShortTermInvestments</ParentRole>
      <Position>20</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>40501 - Disclosure - PREPAID EXPENSES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosurePrepaidExpensesDetails</Role>
      <ShortName>PREPAID EXPENSES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.brainstorm-cell.com/role/DisclosurePrepaidExpenses</ParentRole>
      <Position>21</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>40601 - Disclosure - LEASES - Supplemental cash flow information related to operating leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureLeasesSupplementalCashFlowInformationRelatedToOperatingLeasesDetails</Role>
      <ShortName>LEASES - Supplemental cash flow information related to operating leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>40602 - Disclosure - LEASES - Future lease payments under operating leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureLeasesFutureLeasePaymentsUnderOperatingLeasesDetails</Role>
      <ShortName>LEASES - Future lease payments under operating leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>40603 - Disclosure - LEASES - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureLeasesAdditionalInformationDetails</Role>
      <ShortName>LEASES - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>40701 - Disclosure - DEFERRED GRANT INCOME (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureDeferredGrantIncomeDetails</Role>
      <ShortName>DEFERRED GRANT INCOME (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.brainstorm-cell.com/role/DisclosureDeferredGrantIncome</ParentRole>
      <Position>25</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>40801 - Disclosure - STOCK CAPITAL - Restricted Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureStockCapitalRestrictedStockDetails</Role>
      <ShortName>STOCK CAPITAL - Restricted Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>40802 - Disclosure - STOCK CAPITAL - Employee Stock Option (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureStockCapitalEmployeeStockOptionDetails</Role>
      <ShortName>STOCK CAPITAL - Employee Stock Option (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>40803 - Disclosure - STOCK CAPITAL - Stock-Based Compensation Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureStockCapitalStockBasedCompensationExpenseDetails</Role>
      <ShortName>STOCK CAPITAL - Stock-Based Compensation Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="bcli-20190930.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>40804 - Disclosure - STOCK CAPITAL - Additional information (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.brainstorm-cell.com/role/DisclosureStockCapitalAdditionalInformationDetails</Role>
      <ShortName>STOCK CAPITAL - Additional information (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>bcli-20190930.xml</File>
    <File>bcli-20190930.xsd</File>
    <File>bcli-20190930_cal.xml</File>
    <File>bcli-20190930_def.xml</File>
    <File>bcli-20190930_lab.xml</File>
    <File>bcli-20190930_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/us-gaap/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/srt/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2019-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
