Revenue Recognition (Schedule of Contract Balances) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jan. 01, 2018
Revenue Recognition [Abstract]
Contract assets, included in other current assets	$ 170	$ 0
Contract liabilities, included in advance customer payments/other liabilities	$ 918	$ 443

Amount of contract liabilities, included in advance customer payments.

No definition available.

Name:	cybe_ContractLiabilitiesIncludedInAdvanceCustomerPayments
Namespace Prefix:	cybe_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant