Schedule II - Valuation and Qualifying Accounts (Details Textual) $ in Millions	Dec. 25, 2021 USD ($)
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] \| PCB Test Business Sale [Member]
Reserve for excess and obsolete inventories not charged to expense PCB Test sale	$ 2.2

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

No definition available.

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant