3.20.2 html 203 426 1 false 60 0 false 4 false false R1.htm 00000001 - Document - Document and Entity Information Sheet http://bonso.com/role/DocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 00000002 - Statement - Consolidated Balance Sheets Sheet http://bonso.com/role/BalanceSheets Consolidated Balance Sheets Statements 2 false false R3.htm 00000003 - Statement - Consolidated Balance Sheets (Parenthetical) Sheet http://bonso.com/role/BalanceSheetsParenthetical Consolidated Balance Sheets (Parenthetical) Statements 3 false false R4.htm 00000004 - Statement - Consolidated Statements of Operations and Comprehensive Income Sheet http://bonso.com/role/StatementsOfOperationsAndComprehensiveIncome Consolidated Statements of Operations and Comprehensive Income Statements 4 false false R5.htm 00000005 - Statement - Consolidated Statements of Changes in Stockholders' Equity (Unaudited) Sheet http://bonso.com/role/StatementsOfChangesInStockholdersEquity Consolidated Statements of Changes in Stockholders' Equity (Unaudited) Statements 5 false false R6.htm 00000006 - Statement - Consolidated Statements of Cash Flows Sheet http://bonso.com/role/StatementsOfCashFlows Consolidated Statements of Cash Flows Statements 6 false false R7.htm 00000007 - Disclosure - Description of business and significant accounting policies Sheet http://bonso.com/role/DescriptionOfBusinessAndSignificantAccountingPolicies Description of business and significant accounting policies Notes 7 false false R8.htm 00000008 - Disclosure - Allowance for doubtful accounts Sheet http://bonso.com/role/AllowanceForDoubtfulAccounts Allowance for doubtful accounts Notes 8 false false R9.htm 00000009 - Disclosure - Inventories Sheet http://bonso.com/role/Inventories Inventories Notes 9 false false R10.htm 00000010 - Disclosure - Property, plant and equipment, net Sheet http://bonso.com/role/PropertyPlantAndEquipmentNet Property, plant and equipment, net Notes 10 false false R11.htm 00000011 - Disclosure - Interests of subsidiaries Sheet http://bonso.com/role/InterestsOfSubsidiaries Interests of subsidiaries Notes 11 false false R12.htm 00000012 - Disclosure - Intangible assets, net Sheet http://bonso.com/role/IntangibleAssets Intangible assets, net Notes 12 false false R13.htm 00000013 - Disclosure - Banking facilities Sheet http://bonso.com/role/BankingFacilities Banking facilities Notes 13 false false R14.htm 00000014 - Disclosure - Income tax Sheet http://bonso.com/role/IncomeTax Income tax Notes 14 false false R15.htm 00000015 - Disclosure - Financial instruments at fair value Sheet http://bonso.com/role/FinancialInstrumentsAtFairValue Financial instruments at fair value Notes 15 false false R16.htm 00000016 - Disclosure - Investment in life insurance contract Sheet http://bonso.com/role/InvestmentInLifeInsuranceContract Investment in life insurance contract Notes 16 false false R17.htm 00000017 - Disclosure - Leases Sheet http://bonso.com/role/Leases Leases Notes 17 false false R18.htm 00000018 - Disclosure - Commitments and contingent liabilities Sheet http://bonso.com/role/CommitmentsAndContingentLiabilities Commitments and contingent liabilities Notes 18 false false R19.htm 00000019 - Disclosure - Stockholders' equity Sheet http://bonso.com/role/StockholdersEquity Stockholders' equity Notes 19 false false R20.htm 00000020 - Disclosure - Stock option and bonus plans Sheet http://bonso.com/role/StockOptionAndBonusPlans Stock option and bonus plans Notes 20 false false R21.htm 00000021 - Disclosure - Related party transactions Sheet http://bonso.com/role/RelatedPartyTransactions Related party transactions Notes 21 false false R22.htm 00000022 - Disclosure - Concentrations and credit risk Sheet http://bonso.com/role/ConcentrationsAndCreditRisk Concentrations and credit risk Notes 22 false false R23.htm 00000023 - Disclosure - Employee retirement benefits and severance payment allowance Sheet http://bonso.com/role/EmployeeRetirementBenefitsAndSeverancePaymentAllowance Employee retirement benefits and severance payment allowance Notes 23 false false R24.htm 00000024 - Disclosure - Net earnings per share Sheet http://bonso.com/role/NetEarningsPerShare Net earnings per share Notes 24 false false R25.htm 00000025 - Disclosure - Business segment information Sheet http://bonso.com/role/BusinessSegmentInformation Business segment information Notes 25 false false R26.htm 00000026 - Disclosure - Long-term loan and long-term deposit received Sheet http://bonso.com/role/Long-termLoanAndLong-termDepositReceived Long-term loan and long-term deposit received Notes 26 false false R27.htm 00000027 - Disclosure - Other income, net Sheet http://bonso.com/role/OtherIncomeNet Other income, net Notes 27 false false R28.htm 00000028 - Disclosure - Non-operating (expenses) / income, net Sheet http://bonso.com/role/Non-operatingExpensesIncomeNet Non-operating (expenses) / income, net Notes 28 false false R29.htm 00000029 - Disclosure - Financial instruments at amortized cost Sheet http://bonso.com/role/FinancialInstrumentsAtAmortizedCost Financial instruments at amortized cost Notes 29 false false R30.htm 00000030 - Disclosure - Subsequent events Sheet http://bonso.com/role/SubsequentEvents Subsequent events Notes 30 false false R31.htm 00000031 - Disclosure - Description of business and significant accounting policies (Policies) Sheet http://bonso.com/role/DescriptionOfBusinessAndSignificantAccountingPoliciesPolicies Description of business and significant accounting policies (Policies) Policies 31 false false R32.htm 00000032 - Disclosure - Inventories (Tables) Sheet http://bonso.com/role/InventoriesTables Inventories (Tables) Tables http://bonso.com/role/Inventories 32 false false R33.htm 00000033 - Disclosure - Property, plant and equipment, net (Tables) Sheet http://bonso.com/role/PropertyPlantAndEquipmentNetTables Property, plant and equipment, net (Tables) Tables http://bonso.com/role/PropertyPlantAndEquipmentNet 33 false false R34.htm 00000034 - Disclosure - Interests of subsidiaries (Tables) Sheet http://bonso.com/role/InterestsOfSubsidiariesTables Interests of subsidiaries (Tables) Tables http://bonso.com/role/InterestsOfSubsidiaries 34 false false R35.htm 00000035 - Disclosure - Intangible assets (Tables) Sheet http://bonso.com/role/IntangibleAssetsTables Intangible assets (Tables) Tables http://bonso.com/role/IntangibleAssets 35 false false R36.htm 00000036 - Disclosure - Banking facilities (Tables) Sheet http://bonso.com/role/BankingFacilitiesTables Banking facilities (Tables) Tables http://bonso.com/role/BankingFacilities 36 false false R37.htm 00000037 - Disclosure - Income tax (Tables) Sheet http://bonso.com/role/IncomeTaxTables Income tax (Tables) Tables http://bonso.com/role/IncomeTax 37 false false R38.htm 00000038 - Disclosure - Financial instruments at fair value (Tables) Sheet http://bonso.com/role/FinancialInstrumentsAtFairValueTables Financial instruments at fair value (Tables) Tables http://bonso.com/role/FinancialInstrumentsAtFairValue 38 false false R39.htm 00000039 - Disclosure - Leases (Tables) Sheet http://bonso.com/role/LeasesTables Leases (Tables) Tables http://bonso.com/role/Leases 39 false false R40.htm 00000040 - Disclosure - Commitments and contingent liabilities (Tables) Sheet http://bonso.com/role/CommitmentsAndContingentLiabilitiesTables Commitments and contingent liabilities (Tables) Tables http://bonso.com/role/CommitmentsAndContingentLiabilities 40 false false R41.htm 00000041 - Disclosure - Stock option and bonus plans (Tables) Sheet http://bonso.com/role/StockOptionAndBonusPlansTables Stock option and bonus plans (Tables) Tables http://bonso.com/role/StockOptionAndBonusPlans 41 false false R42.htm 00000042 - Disclosure - Related party transactions (Tables) Sheet http://bonso.com/role/RelatedPartyTransactionsTables Related party transactions (Tables) Tables http://bonso.com/role/RelatedPartyTransactions 42 false false R43.htm 00000043 - Disclosure - Concentrations and credit risk (Tables) Sheet http://bonso.com/role/ConcentrationsAndCreditRiskTables Concentrations and credit risk (Tables) Tables http://bonso.com/role/ConcentrationsAndCreditRisk 43 false false R44.htm 00000044 - Disclosure - Net earnings per share (Tables) Sheet http://bonso.com/role/NetEarningsPerShareTables Net earnings per share (Tables) Tables http://bonso.com/role/NetEarningsPerShare 44 false false R45.htm 00000045 - Disclosure - Business segment information (Tables) Sheet http://bonso.com/role/BusinessSegmentInformationTables Business segment information (Tables) Tables http://bonso.com/role/BusinessSegmentInformation 45 false false R46.htm 00000046 - Disclosure - Other income, net (Tables) Sheet http://bonso.com/role/OtherIncomeNetTables Other income, net (Tables) Tables http://bonso.com/role/OtherIncomeNet 46 false false R47.htm 00000047 - Disclosure - Non-operating (expenses) / income, net (Tables) Sheet http://bonso.com/role/Non-operatingExpensesIncomeNetTables Non-operating (expenses) / income, net (Tables) Tables http://bonso.com/role/Non-operatingExpensesIncomeNet 47 false false R48.htm 00000048 - Disclosure - Description of business and significant accounting policies (Details Narrative) Sheet http://bonso.com/role/DescriptionOfBusinessAndSignificantAccountingPoliciesDetailsNarrative Description of business and significant accounting policies (Details Narrative) Details http://bonso.com/role/DescriptionOfBusinessAndSignificantAccountingPoliciesPolicies 48 false false R49.htm 00000049 - Disclosure - Allowance for doubtful accounts (Details Narrative) Sheet http://bonso.com/role/AllowanceForDoubtfulAccountsDetailsNarrative Allowance for doubtful accounts (Details Narrative) Details http://bonso.com/role/AllowanceForDoubtfulAccounts 49 false false R50.htm 00000050 - Disclosure - Inventories (Details) Sheet http://bonso.com/role/InventoriesDetails Inventories (Details) Details http://bonso.com/role/InventoriesTables 50 false false R51.htm 00000051 - Disclosure - Inventories (Details Narrative) Sheet http://bonso.com/role/InventoriesDetailsNarrative Inventories (Details Narrative) Details http://bonso.com/role/InventoriesTables 51 false false R52.htm 00000052 - Disclosure - Property, plant and equipment, net (Details) Sheet http://bonso.com/role/PropertyPlantAndEquipmentNetDetails Property, plant and equipment, net (Details) Details http://bonso.com/role/PropertyPlantAndEquipmentNetTables 52 false false R53.htm 00000053 - Disclosure - Property, plant and equipment, net (Details Narrative) Sheet http://bonso.com/role/PropertyPlantAndEquipmentNetDetailsNarrative Property, plant and equipment, net (Details Narrative) Details http://bonso.com/role/PropertyPlantAndEquipmentNetTables 53 false false R54.htm 00000054 - Disclosure - Interests in subsidiaries (Details) Sheet http://bonso.com/role/InterestsInSubsidiariesDetails Interests in subsidiaries (Details) Details 54 false false R55.htm 00000055 - Disclosure - Intangible assets (Details) Sheet http://bonso.com/role/IntangibleAssetsDetails Intangible assets (Details) Details http://bonso.com/role/IntangibleAssetsTables 55 false false R56.htm 00000056 - Disclosure - Intangible assets (Details 1) Sheet http://bonso.com/role/IntangibleAssetsDetails1 Intangible assets (Details 1) Details http://bonso.com/role/IntangibleAssetsTables 56 false false R57.htm 00000057 - Disclosure - Intangible assets (Details 2) Sheet http://bonso.com/role/IntangibleAssetsDetails2 Intangible assets (Details 2) Details http://bonso.com/role/IntangibleAssetsTables 57 false false R58.htm 00000058 - Disclosure - Intangible assets (Details Narrative) Sheet http://bonso.com/role/IntangibleAssetsDetailsNarrative Intangible assets (Details Narrative) Details http://bonso.com/role/IntangibleAssetsTables 58 false false R59.htm 00000059 - Disclosure - Banking facilities (Details) Sheet http://bonso.com/role/BankingFacilitiesDetails Banking facilities (Details) Details http://bonso.com/role/BankingFacilitiesTables 59 false false R60.htm 00000060 - Disclosure - Banking facilities (Details 1) Sheet http://bonso.com/role/BankingFacilitiesDetails1 Banking facilities (Details 1) Details http://bonso.com/role/BankingFacilitiesTables 60 false false R61.htm 00000061 - Disclosure - Income Tax (Details) Sheet http://bonso.com/role/IncomeTaxDetails Income Tax (Details) Details 61 false false R62.htm 00000062 - Disclosure - Income Tax (Details 1) Sheet http://bonso.com/role/IncomeTaxDetails1 Income Tax (Details 1) Details 62 false false R63.htm 00000063 - Disclosure - Income Tax (Details 2) Sheet http://bonso.com/role/IncomeTaxDetails2 Income Tax (Details 2) Details 63 false false R64.htm 00000064 - Disclosure - Income Tax (Details 3) Sheet http://bonso.com/role/IncomeTaxDetails3 Income Tax (Details 3) Details 64 false false R65.htm 00000065 - Disclosure - Income Tax (Details 4) Sheet http://bonso.com/role/IncomeTaxDetails4 Income Tax (Details 4) Details 65 false false R66.htm 00000066 - Disclosure - Income Tax (Details 5) Sheet http://bonso.com/role/IncomeTaxDetails5 Income Tax (Details 5) Details 66 false false R67.htm 00000067 - Disclosure - Income Tax (Details 6) Sheet http://bonso.com/role/IncomeTaxDetails6 Income Tax (Details 6) Details 67 false false R68.htm 00000068 - Disclosure - Income Tax (Details Narrative) Sheet http://bonso.com/role/IncomeTaxDetailsNarrative Income Tax (Details Narrative) Details 68 false false R69.htm 00000069 - Disclosure - Income Tax (Details Narrative 1) Sheet http://bonso.com/role/IncomeTaxDetailsNarrative1 Income Tax (Details Narrative 1) Details 69 false false R70.htm 00000070 - Disclosure - Financial instruments at fair value (Details) Sheet http://bonso.com/role/FinancialInstrumentsAtFairValueDetails Financial instruments at fair value (Details) Details http://bonso.com/role/FinancialInstrumentsAtFairValueTables 70 false false R71.htm 00000071 - Disclosure - Financial instruments at fair value (Details Narrative) Sheet http://bonso.com/role/FinancialInstrumentsAtFairValueDetailsNarrative Financial instruments at fair value (Details Narrative) Details http://bonso.com/role/FinancialInstrumentsAtFairValueTables 71 false false R72.htm 00000072 - Disclosure - Investment in life insurance contract (Details Narrative) Sheet http://bonso.com/role/InvestmentInLifeInsuranceContractDetailsNarrative Investment in life insurance contract (Details Narrative) Details http://bonso.com/role/InvestmentInLifeInsuranceContract 72 false false R73.htm 00000073 - Disclosure - Leases (Details) Sheet http://bonso.com/role/LeasesDetails Leases (Details) Details http://bonso.com/role/LeasesTables 73 false false R74.htm 00000074 - Disclosure - Leases (Details 1) Sheet http://bonso.com/role/LeasesDetails1 Leases (Details 1) Details http://bonso.com/role/LeasesTables 74 false false R75.htm 00000075 - Disclosure - Leases (Details 2) Sheet http://bonso.com/role/LeasesDetails2 Leases (Details 2) Details http://bonso.com/role/LeasesTables 75 false false R76.htm 00000076 - Disclosure - Leases (Details 3) Sheet http://bonso.com/role/LeasesDetails3 Leases (Details 3) Details http://bonso.com/role/LeasesTables 76 false false R77.htm 00000077 - Disclosure - Leases (Details Narrative) Sheet http://bonso.com/role/LeasesDetailsNarrative Leases (Details Narrative) Details http://bonso.com/role/LeasesTables 77 false false R78.htm 00000078 - Disclosure - Commitments and contingent liabilities (Details) Sheet http://bonso.com/role/CommitmentsAndContingentLiabilitiesDetails Commitments and contingent liabilities (Details) Details http://bonso.com/role/CommitmentsAndContingentLiabilitiesTables 78 false false R79.htm 00000079 - Disclosure - Commitments and contingent liabilities (Details Narrative) Sheet http://bonso.com/role/CommitmentsDetailsNarrative Commitments and contingent liabilities (Details Narrative) Details http://bonso.com/role/CommitmentsAndContingentLiabilitiesTables 79 false false R80.htm 00000080 - Disclosure - Stockholders' equity (Details Narrative) Sheet http://bonso.com/role/StockholdersEquityDetailsNarrative Stockholders' equity (Details Narrative) Details http://bonso.com/role/StockholdersEquity 80 false false R81.htm 00000081 - Disclosure - Stock Option and bonus plans (Details) Sheet http://bonso.com/role/StockOptionAndBonusPlansDetails Stock Option and bonus plans (Details) Details 81 false false R82.htm 00000082 - Disclosure - Stock Option and bonus plans (Details 1) Sheet http://bonso.com/role/StockOptionAndBonusPlansDetails1 Stock Option and bonus plans (Details 1) Details 82 false false R83.htm 00000083 - Disclosure - Stock Option and bonus plans (Details 2) Sheet http://bonso.com/role/StockOptionAndBonusPlansDetails2 Stock Option and bonus plans (Details 2) Details 83 false false R84.htm 00000084 - Disclosure - Stock Option and bonus plans (Details Narrative) Sheet http://bonso.com/role/StockOptionAndBonusPlansDetailsNarrative Stock Option and bonus plans (Details Narrative) Details 84 false false R85.htm 00000085 - Disclosure - Related party transactions (Details) Sheet http://bonso.com/role/RelatedPartyTransactionsDetails Related party transactions (Details) Details http://bonso.com/role/RelatedPartyTransactionsTables 85 false false R86.htm 00000086 - Disclosure - Related party transactions (Details Narrative) Sheet http://bonso.com/role/RelatedPartyTransactionsDetailsNarrative Related party transactions (Details Narrative) Details http://bonso.com/role/RelatedPartyTransactionsTables 86 false false R87.htm 00000087 - Disclosure - Concentrations and Credit Risk (Details) Sheet http://bonso.com/role/ConcentrationsAndCreditRiskDetails Concentrations and Credit Risk (Details) Details 87 false false R88.htm 00000088 - Disclosure - Concentrations and credit risk (Details 1) Sheet http://bonso.com/role/ConcentrationsAndCreditRiskDetails1 Concentrations and credit risk (Details 1) Details http://bonso.com/role/ConcentrationsAndCreditRiskTables 88 false false R89.htm 00000089 - Disclosure - Concentrations and Credit Risk (Details Narrative) Sheet http://bonso.com/role/ConcentrationsAndCreditRiskDetailsNarrative Concentrations and Credit Risk (Details Narrative) Details 89 false false R90.htm 00000090 - Disclosure - Employee retirement benefits and severance payment allowance (Details Narrative) Sheet http://bonso.com/role/EmployeeRetirementBenefitsAndSeverancePaymentAllowanceDetailsNarrative Employee retirement benefits and severance payment allowance (Details Narrative) Details http://bonso.com/role/EmployeeRetirementBenefitsAndSeverancePaymentAllowance 90 false false R91.htm 00000091 - Disclosure - Net earnings per share (Details) Sheet http://bonso.com/role/LossPerShareDetails Net earnings per share (Details) Details http://bonso.com/role/NetEarningsPerShareTables 91 false false R92.htm 00000092 - Disclosure - Business segment Information (Details) Sheet http://bonso.com/role/BusinessSegmentInformationDetails Business segment Information (Details) Details 92 false false R93.htm 00000093 - Disclosure - Business segment information (Details 1) Sheet http://bonso.com/role/BusinessSegmentInformationDetails1 Business segment information (Details 1) Details http://bonso.com/role/BusinessSegmentInformationTables 93 false false R94.htm 00000094 - Disclosure - Business segment information (Details 2) Sheet http://bonso.com/role/BusinessSegmentInformationDetails2 Business segment information (Details 2) Details http://bonso.com/role/BusinessSegmentInformationTables 94 false false R95.htm 00000095 - Disclosure - Business segment information (Details 3) Sheet http://bonso.com/role/BusinessSegmentInformationDetails3 Business segment information (Details 3) Details http://bonso.com/role/BusinessSegmentInformationTables 95 false false R96.htm 00000096 - Disclosure - Business segment information (Details 4) Sheet http://bonso.com/role/BusinessSegmentInformationDetails4 Business segment information (Details 4) Details http://bonso.com/role/BusinessSegmentInformationTables 96 false false R97.htm 00000097 - Disclosure - Long-term loan and long-term deposit received (Details Narrative) Sheet http://bonso.com/role/Long-termLoanAndLong-termDepositReceivedDetailsNarrative Long-term loan and long-term deposit received (Details Narrative) Details http://bonso.com/role/Long-termLoanAndLong-termDepositReceived 97 false false R98.htm 00000098 - Disclosure - Other income, net (Details) Sheet http://bonso.com/role/OtherIncomeNetDetails Other income, net (Details) Details http://bonso.com/role/OtherIncomeNetTables 98 false false R99.htm 00000099 - Disclosure - Non-operating (expenses) / income, net (Details) Sheet http://bonso.com/role/Non-operatingExpensesIncomeNetDetails Non-operating (expenses) / income, net (Details) Details http://bonso.com/role/Non-operatingExpensesIncomeNetTables 99 false false R100.htm 00000100 - Disclosure - Financial instruments at amortized cost (Details Narrative) Sheet http://bonso.com/role/FinancialInstrumentsAtAmortizedCostDetailsNarrative Financial instruments at amortized cost (Details Narrative) Details http://bonso.com/role/FinancialInstrumentsAtAmortizedCost 100 false false R101.htm 00000101 - Disclosure - Subsequent events (Details Narrative) Sheet http://bonso.com/role/SubsequentEventsDetailsNarrative Subsequent events (Details Narrative) Details http://bonso.com/role/SubsequentEvents 101 false false All Reports Book All Reports bnso-20200331.xml bnso-20200331.xsd bnso-20200331_cal.xml bnso-20200331_def.xml bnso-20200331_lab.xml bnso-20200331_pre.xml http://fasb.org/us-gaap/2020-01-31 http://fasb.org/srt/2020-01-31 http://xbrl.sec.gov/country/2020-01-31 http://xbrl.sec.gov/dei/2020-01-31 true true