Summary of Significant Accounting Policies and Related Data (Narrative) (Details) (USD $)	9 Months Ended
Jan. 25, 2013
Summary of Significant Accounting Policies and Related Data [Abstract]
Medical devices sold domestically, excise tax percentage	2.30%
Medical Device Excise Tax reported in cost of good sold	$ 327,000

The amount of Medical Device Excise Tax reported as an expense in cost of sales on statement of income.

No definition available.

Name:	cybx_MedicalDeviceExciseTaxReportedInCostOfGoodSold
Namespace Prefix:	cybx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration