Note 4 - Segment Reporting Information (Details Textual) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2021	Dec. 31, 2020 USD ($)
Number of Operating Segments			2
Revenue from Contract with Customer, Including Assessed Tax	$ 111,143	$ 76,387	$ 217,540		$ 146,393
Intersegment Revenue Markup Percentage			10.00%
Display Solutions Segment [Member]
Revenue from Contract with Customer, Including Assessed Tax	53,867	$ 31,261	$ 109,004		$ 55,862
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]
Number of Major Customers			1
Revenue from Contract with Customer, Including Assessed Tax	$ 11,400		$ 23,700
Concentration Risk, Percentage	10.30%		10.90%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Major Customers			0	0	0