Document and Entity Information (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
Apr. 26, 2013	Jun. 11, 2013	Oct. 26, 2012
Consolidated Balance Sheets [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Apr. 26, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	FY
Entity Registrant Name	CYBERONICS INC
Entity Central Index Key	0000864683
Current Fiscal Year End Date	--04-26
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		27,484,154
Entity Well-known Seasoned Issuer	No
Entity Public Float			$ 819.7
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Trading Symbol	cybx

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