3.22.0.1 html 327 473 1 false 86 0 false 7 false false R1.htm 00090 - Document - Document and Entity Information Sheet http://www.cytosorbents.com/role/DocumentDocumentAndEntityInformation Document and Entity Information Cover 1 false false R2.htm 00100 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.cytosorbents.com/role/StatementConsolidatedBalanceSheets CONSOLIDATED BALANCE SHEETS Statements 2 false false R3.htm 00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.cytosorbents.com/role/StatementConsolidatedBalanceSheetsParenthetical CONSOLIDATED BALANCE SHEETS (Parenthetical) Statements 3 false false R4.htm 00200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS Sheet http://www.cytosorbents.com/role/StatementConsolidatedStatementsOfOperationsAndComprehensiveLoss CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS Statements 4 false false R5.htm 00300 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Sheet http://www.cytosorbents.com/role/StatementConsolidatedStatementsOfChangesInStockholdersEquity CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Statements 5 false false R6.htm 00400 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS Sheet http://www.cytosorbents.com/role/StatementConsolidatedStatementsOfCashFlows CONSOLIDATED STATEMENTS OF CASH FLOWS Statements 6 false false R7.htm 10101 - Disclosure - BASIS OF PRESENTATION Sheet http://www.cytosorbents.com/role/DisclosureBasisOfPresentation BASIS OF PRESENTATION Notes 7 false false R8.htm 10201 - Disclosure - PRINCIPAL BUSINESS ACTIVITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Sheet http://www.cytosorbents.com/role/DisclosurePrincipalBusinessActivityAndSummaryOfSignificantAccountingPolicies PRINCIPAL BUSINESS ACTIVITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Notes 8 false false R9.htm 10301 - Disclosure - REVENUE Sheet http://www.cytosorbents.com/role/DisclosureRevenue REVENUE Notes 9 false false R10.htm 10401 - Disclosure - PROPERTY AND EQUIPMENT, NET Sheet http://www.cytosorbents.com/role/DisclosurePropertyAndEquipmentNet PROPERTY AND EQUIPMENT, NET Notes 10 false false R11.htm 10501 - Disclosure - OTHER ASSETS Sheet http://www.cytosorbents.com/role/DisclosureOtherAssets OTHER ASSETS Notes 11 false false R12.htm 10601 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES Sheet http://www.cytosorbents.com/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES Notes 12 false false R13.htm 10701 - Disclosure - LONG-TERM DEBT Sheet http://www.cytosorbents.com/role/DisclosureLongTermDebt LONG-TERM DEBT Notes 13 false false R14.htm 10801 - Disclosure - LEASES Sheet http://www.cytosorbents.com/role/DisclosureLeases LEASES Notes 14 false false R15.htm 10901 - Disclosure - INCOME TAXES Sheet http://www.cytosorbents.com/role/DisclosureIncomeTaxes INCOME TAXES Notes 15 false false R16.htm 11001 - Disclosure - COMMITMENTS AND CONTINGENCIES Sheet http://www.cytosorbents.com/role/DisclosureCommitmentsAndContingencies COMMITMENTS AND CONTINGENCIES Notes 16 false false R17.htm 11101 - Disclosure - STOCKHOLDERS' EQUITY Sheet http://www.cytosorbents.com/role/DisclosureStockholdersEquity STOCKHOLDERS' EQUITY Notes 17 false false R18.htm 11201 - Disclosure - NET LOSS PER SHARE Sheet http://www.cytosorbents.com/role/DisclosureNetLossPerShare NET LOSS PER SHARE Notes 18 false false R19.htm 11301 - Disclosure - RETIREMENT PLAN Sheet http://www.cytosorbents.com/role/DisclosureRetirementPlan RETIREMENT PLAN Notes 19 false false R20.htm 11401 - Disclosure - SUBSEQUENT EVENTS Sheet http://www.cytosorbents.com/role/DisclosureSubsequentEvents SUBSEQUENT EVENTS Notes 20 false false R21.htm 11501 - Disclosure - QUARTERLY FINANCIAL RESULTS (UNAUDITED) Sheet http://www.cytosorbents.com/role/DisclosureQuarterlyFinancialResultsUnaudited QUARTERLY FINANCIAL RESULTS (UNAUDITED) Notes 21 false false R22.htm 20202 - Disclosure - PRINCIPAL BUSINESS ACTIVITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) Sheet http://www.cytosorbents.com/role/DisclosurePrincipalBusinessActivityAndSummaryOfSignificantAccountingPoliciesPolicies PRINCIPAL BUSINESS ACTIVITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) Policies 22 false false R23.htm 30303 - Disclosure - REVENUE (Tables) Sheet http://www.cytosorbents.com/role/DisclosureRevenueTables REVENUE (Tables) Tables http://www.cytosorbents.com/role/DisclosureRevenue 23 false false R24.htm 30403 - Disclosure - PROPERTY AND EQUIPMENT, NET (Tables) Sheet http://www.cytosorbents.com/role/DisclosurePropertyAndEquipmentNetTables PROPERTY AND EQUIPMENT, NET (Tables) Tables http://www.cytosorbents.com/role/DisclosurePropertyAndEquipmentNet 24 false false R25.htm 30503 - Disclosure - OTHER ASSETS (Tables) Sheet http://www.cytosorbents.com/role/DisclosureOtherAssetsTables OTHER ASSETS (Tables) Tables http://www.cytosorbents.com/role/DisclosureOtherAssets 25 false false R26.htm 30603 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables) Sheet http://www.cytosorbents.com/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES (Tables) Tables http://www.cytosorbents.com/role/DisclosureAccruedExpensesAndOtherCurrentLiabilities 26 false false R27.htm 30803 - Disclosure - LEASES (Tables) Sheet http://www.cytosorbents.com/role/DisclosureLeasesTables LEASES (Tables) Tables http://www.cytosorbents.com/role/DisclosureLeases 27 false false R28.htm 30903 - Disclosure - INCOME TAXES (Tables) Sheet http://www.cytosorbents.com/role/DisclosureIncomeTaxesTables INCOME TAXES (Tables) Tables http://www.cytosorbents.com/role/DisclosureIncomeTaxes 28 false false R29.htm 31103 - Disclosure - STOCKHOLDERS' EQUITY (Tables) Sheet http://www.cytosorbents.com/role/DisclosureStockholdersEquityTables STOCKHOLDERS' EQUITY (Tables) Tables http://www.cytosorbents.com/role/DisclosureStockholdersEquity 29 false false R30.htm 31503 - Disclosure - QUARTERLY FINANCIAL RESULTS (UNAUDITED) (Tables) Sheet http://www.cytosorbents.com/role/DisclosureQuarterlyFinancialResultsUnauditedTables QUARTERLY FINANCIAL RESULTS (UNAUDITED) (Tables) Tables http://www.cytosorbents.com/role/DisclosureQuarterlyFinancialResultsUnaudited 30 false false R31.htm 40101 - Disclosure - BASIS OF PRESENTATION (Details) Sheet http://www.cytosorbents.com/role/DisclosureBasisOfPresentationDetails BASIS OF PRESENTATION (Details) Details http://www.cytosorbents.com/role/DisclosureBasisOfPresentation 31 false false R32.htm 40201 - Disclosure - PRINCIPAL BUSINESS ACTIVITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) Sheet http://www.cytosorbents.com/role/DisclosurePrincipalBusinessActivityAndSummaryOfSignificantAccountingPoliciesDetails PRINCIPAL BUSINESS ACTIVITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) Details http://www.cytosorbents.com/role/DisclosurePrincipalBusinessActivityAndSummaryOfSignificantAccountingPoliciesPolicies 32 false false R33.htm 40202 - Disclosure - PRINCIPAL BUSINESS ACTIVITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash and Cash Equivalents (Details) Sheet http://www.cytosorbents.com/role/DisclosurePrincipalBusinessActivityAndSummaryOfSignificantAccountingPoliciesCashAndCashEquivalentsDetails PRINCIPAL BUSINESS ACTIVITY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash and Cash Equivalents (Details) Details 33 false false R34.htm 40301 - Disclosure - REVENUE - Revenue by customer type and geographic area (Details) Sheet http://www.cytosorbents.com/role/DisclosureRevenueRevenueByCustomerTypeAndGeographicAreaDetails REVENUE - Revenue by customer type and geographic area (Details) Details 34 false false R35.htm 40302 - Disclosure - REVENUE - Receivables and contract liabilities (Details) Sheet http://www.cytosorbents.com/role/DisclosureRevenueReceivablesAndContractLiabilitiesDetails REVENUE - Receivables and contract liabilities (Details) Details 35 false false R36.htm 40303 - Disclosure - REVENUE - Additional information (Details) Sheet http://www.cytosorbents.com/role/DisclosureRevenueAdditionalInformationDetails REVENUE - Additional information (Details) Details 36 false false R37.htm 40401 - Disclosure - PROPERTY AND EQUIPMENT, NET (Details) Sheet http://www.cytosorbents.com/role/DisclosurePropertyAndEquipmentNetDetails PROPERTY AND EQUIPMENT, NET (Details) Details http://www.cytosorbents.com/role/DisclosurePropertyAndEquipmentNetTables 37 false false R38.htm 40402 - Disclosure - PROPERTY AND EQUIPMENT, NET - Additional information (Details) Sheet http://www.cytosorbents.com/role/DisclosurePropertyAndEquipmentNetAdditionalInformationDetails PROPERTY AND EQUIPMENT, NET - Additional information (Details) Details 38 false false R39.htm 40501 - Disclosure - OTHER ASSETS (Details) Sheet http://www.cytosorbents.com/role/DisclosureOtherAssetsDetails OTHER ASSETS (Details) Details http://www.cytosorbents.com/role/DisclosureOtherAssetsTables 39 false false R40.htm 40502 - Disclosure - OTHER ASSETS: - Additional information (Details) Sheet http://www.cytosorbents.com/role/DisclosureOtherAssetsAdditionalInformationDetails OTHER ASSETS: - Additional information (Details) Details 40 false false R41.htm 40601 - Disclosure - ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES: (Details) Sheet http://www.cytosorbents.com/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesDetails ACCRUED EXPENSES AND OTHER CURRENT LIABILITIES: (Details) Details http://www.cytosorbents.com/role/DisclosureAccruedExpensesAndOtherCurrentLiabilitiesTables 41 false false R42.htm 40701 - Disclosure - LONG-TERM DEBT: (Details) Sheet http://www.cytosorbents.com/role/DisclosureLongTermDebtDetails LONG-TERM DEBT: (Details) Details http://www.cytosorbents.com/role/DisclosureLongTermDebt 42 false false R43.htm 40801 - Disclosure - LEASES: - ROU and Lease liability (Details) Sheet http://www.cytosorbents.com/role/DisclosureLeasesRouAndLeaseLiabilityDetails LEASES: - ROU and Lease liability (Details) Details 43 false false R44.htm 40802 - Disclosure - LEASES: - Maturities of Lease liabilities (Details) Sheet http://www.cytosorbents.com/role/DisclosureLeasesMaturitiesOfLeaseLiabilitiesDetails LEASES: - Maturities of Lease liabilities (Details) Details 44 false false R45.htm 40803 - Disclosure - LEASES: - Additional Information (Details) Sheet http://www.cytosorbents.com/role/DisclosureLeasesAdditionalInformationDetails LEASES: - Additional Information (Details) Details 45 false false R46.htm 40901 - Disclosure - INCOME TAXES: - Consolidated loss before income taxes (Details) Sheet http://www.cytosorbents.com/role/DisclosureIncomeTaxesConsolidatedLossBeforeIncomeTaxesDetails INCOME TAXES: - Consolidated loss before income taxes (Details) Details 46 false false R47.htm 40902 - Disclosure - INCOME TAXES: - The benefit from income taxes (Details) Sheet http://www.cytosorbents.com/role/DisclosureIncomeTaxesBenefitFromIncomeTaxesDetails INCOME TAXES: - The benefit from income taxes (Details) Details 47 false false R48.htm 40903 - Disclosure - INCOME TAXES: - The principal components of the Company's deferred tax assets and liabilities (Details) Sheet http://www.cytosorbents.com/role/DisclosureIncomeTaxesPrincipalComponentsOfCompanySDeferredTaxAssetsAndLiabilitiesDetails INCOME TAXES: - The principal components of the Company's deferred tax assets and liabilities (Details) Details 48 false false R49.htm 40904 - Disclosure - INCOME TAXES: - Reconciliation of income tax (expense) benefit (Details) Sheet http://www.cytosorbents.com/role/DisclosureIncomeTaxesReconciliationOfIncomeTaxExpenseBenefitDetails INCOME TAXES: - Reconciliation of income tax (expense) benefit (Details) Details 49 false false R50.htm 40905 - Disclosure - INCOME TAXES: - Additional information (Details) Sheet http://www.cytosorbents.com/role/DisclosureIncomeTaxesAdditionalInformationDetails INCOME TAXES: - Additional information (Details) Details 50 false false R51.htm 41001 - Disclosure - COMMITMENTS AND CONTINGENCIES: (Details) Sheet http://www.cytosorbents.com/role/DisclosureCommitmentsAndContingenciesDetails COMMITMENTS AND CONTINGENCIES: (Details) Details http://www.cytosorbents.com/role/DisclosureCommitmentsAndContingencies 51 false false R52.htm 41101 - Disclosure - STOCKHOLDERS' EQUITY - Stock option activity (Details) Sheet http://www.cytosorbents.com/role/DisclosureStockholdersEquityStockOptionActivityDetails STOCKHOLDERS' EQUITY - Stock option activity (Details) Details 52 false false R53.htm 41102 - Disclosure - STOCKHOLDERS' EQUITY - Intrinsic value (Details) Sheet http://www.cytosorbents.com/role/DisclosureStockholdersEquityIntrinsicValueDetails STOCKHOLDERS' EQUITY - Intrinsic value (Details) Details 53 false false R54.htm 41103 - Disclosure - STOCKHOLDERS' EQUITY - Non-vested options (Details) Sheet http://www.cytosorbents.com/role/DisclosureStockholdersEquityNonVestedOptionsDetails STOCKHOLDERS' EQUITY - Non-vested options (Details) Details 54 false false R55.htm 41104 - Disclosure - STOCKHOLDERS' EQUITY - Restricted stock unit (Details) Sheet http://www.cytosorbents.com/role/DisclosureStockholdersEquityRestrictedStockUnitDetails STOCKHOLDERS' EQUITY - Restricted stock unit (Details) Details 55 false false R56.htm 41105 - Disclosure - STOCKHOLDERS' EQUITY - Restricted stock unit activity (Details) Sheet http://www.cytosorbents.com/role/DisclosureStockholdersEquityRestrictedStockUnitActivityDetails STOCKHOLDERS' EQUITY - Restricted stock unit activity (Details) Details 56 false false R57.htm 41106 - Disclosure - STOCKHOLDERS' EQUITY - Fair value of stock option (Details) Sheet http://www.cytosorbents.com/role/DisclosureStockholdersEquityFairValueOfStockOptionDetails STOCKHOLDERS' EQUITY - Fair value of stock option (Details) Details 57 false false R58.htm 41107 - Disclosure - STOCKHOLDERS' EQUITY - Additional information (Details) Sheet http://www.cytosorbents.com/role/DisclosureStockholdersEquityAdditionalInformationDetails STOCKHOLDERS' EQUITY - Additional information (Details) Details 58 false false R59.htm 41201 - Disclosure - NET LOSS PER SHARE (Details) Sheet http://www.cytosorbents.com/role/DisclosureNetLossPerShareDetails NET LOSS PER SHARE (Details) Details http://www.cytosorbents.com/role/DisclosureNetLossPerShare 59 false false R60.htm 41301 - Disclosure - RETIREMENT PLAN (Details) Sheet http://www.cytosorbents.com/role/DisclosureRetirementPlanDetails RETIREMENT PLAN (Details) Details http://www.cytosorbents.com/role/DisclosureRetirementPlan 60 false false R61.htm 41401 - Disclosure - SUBSEQUENT EVENTS (Details) Sheet http://www.cytosorbents.com/role/DisclosureSubsequentEventsDetails SUBSEQUENT EVENTS (Details) Details http://www.cytosorbents.com/role/DisclosureSubsequentEvents 61 false false R62.htm 41501 - Disclosure - QUARTERLY FINANCIAL RESULTS (UNAUDITED) (Details) Sheet http://www.cytosorbents.com/role/DisclosureQuarterlyFinancialResultsUnauditedDetails QUARTERLY FINANCIAL RESULTS (UNAUDITED) (Details) Details http://www.cytosorbents.com/role/DisclosureQuarterlyFinancialResultsUnauditedTables 62 false false All Reports Book All Reports ctso-20211231x10k.htm ctso-20211231.xsd ctso-20211231_cal.xml ctso-20211231_def.xml ctso-20211231_lab.xml ctso-20211231_pre.xml ctso-20211231xex21d1.htm ctso-20211231xex23d1.htm ctso-20211231xex31d1.htm ctso-20211231xex31d2.htm ctso-20211231xex32d1.htm ctso-20211231xex32d2.htm ctso-20211231xex4d1.htm ctso-20211231x10k001.jpg http://fasb.org/srt/2021-01-31 http://fasb.org/us-gaap/2021-01-31 http://xbrl.sec.gov/dei/2021q4 true true