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Stockholders' Equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended			12 Months Ended
	Sep. 30, 2014	Aug. 31, 2013	Jun. 30, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Total net proceeds received from IPO	$ 88,468us-gaap_ProceedsFromIssuanceInitialPublicOffering			$ 88,468us-gaap_ProceedsFromIssuanceInitialPublicOffering
Share split ratio			10us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
Stock split				In June, 2012, the Company affected a ten-for-one share split by means of a share dividend of nine shares for each share then outstanding.
Share based compensation number of shares available for grant				184,261us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Share based compensation expiration period				10 years
Share based compensation vesting period				4 years
Unrecognized share based compensation expense				4,273us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Unrecognized share based compensation expense recognition period				2 years 11 months 1 day
Warrants issued		15,000us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Warrants exercise price		$ 2.21us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Expenses related to warrants		19us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued
Expected dividend yield				0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate	0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Fair value of shares per share				$ 39.65us-gaap_SharePrice
IPO
Class of Stock [Line Items]
Ordinary shares issued for service	5,360,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
Public offering price	$ 16.00us-gaap_SharesIssuedPricePerShare / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
Underwriting discounts and commissions	6,904cybr_UnderwritersDiscountsAndCommissions / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
Other offering expense	3,846cybr_OtherOfferingExpenses / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_IPOMember
Over-Allotment Option
Class of Stock [Line Items]
Ordinary shares issued for service	804,000us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_OverAllotmentOptionMember
Public offering price	$ 16.00us-gaap_SharesIssuedPricePerShare / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_OverAllotmentOptionMember
Offering expense included in additional paid-in capital balance	$ 592us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_OverAllotmentOptionMember

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