Note 8 - Goodwill and Other Intangible Assets (Details Textual)	3 Months Ended
Sep. 30, 2026
Goodwill, Reporting Unit, Number	8
Display Solutions Segment [Member]
Goodwill, Reporting Unit, Number	7
Lighting Segment [Member]
Goodwill, Reporting Unit, Number	1

Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 350
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482573/350-20-50-2

Name:	us-gaap_NumberOfReportingUnits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration