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General - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2014
General [Line Items]
Total net proceeds received from IPO	$ 88,468us-gaap_ProceedsFromIssuanceInitialPublicOffering	$ 88,468us-gaap_ProceedsFromIssuanceInitialPublicOffering
IPO
General [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
General [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

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Other Offering Expenses

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Underwriters Discounts And Commissions

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The cash inflow associated with the amount received from entity's first offering of stock to the public.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585

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Amount per share or per unit of equity securities issued by non-development stage entity.

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Number of new stock issued during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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