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Investments (Details)	9 Months Ended
Investments (Details)	Jan. 25, 2013
[Investments Abstract]
Short-term investments maturity range	6 months - 12 months

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- Definition

Maturity range of short-term investments

+ References

No definition available.

+ Details

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Namespace Prefix:	cybx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Details

Name:	us-gaap_InvestmentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration