Note 4 - Segment Reporting Information (Details Textual) $ in Thousands	3 Months Ended
	Sep. 30, 2021 USD ($)	Jun. 30, 2021	Sep. 30, 2020 USD ($)
Number of Operating Segments	2
Revenue from Contract with Customer, Including Assessed Tax	$ 106,397		$ 70,006
Intersegment Revenue Markup Percentage	10.00%
Display Solutions Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 55,137		$ 24,601
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers			0
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Display Solutions Segment [Member] | One Customer [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 12,300
Concentration Risk, Percentage	11.60%
Number of Major Customers	1
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Major Customers	0	0