Note 15 - Subsequent Events (Details Textual) - USD ($) $ in Thousands	Jul. 19, 2021	Dec. 28, 2020
Subsequent Event [Member]
Incremental Sublease Income Above Impairment Charge	$ 350
EMS Segment Restructuring and Facility Consolidation [Member]
Operating Lease, Impairment Loss		$ 522

Amount of loss from impairment of right-of-use asset from operating lease.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 25
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123399704&loc=SL77918431-209957

Name:	us-gaap_OperatingLeaseImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration