Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jun. 30, 2019

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Twelve Months Ended
( In thousands)	June 30, 2019
	Lighting Segment		Graphics Segment
Timing of revenue recognition
Products and services transferred at a point in time	$	207,577	$	54,866
Products and services transferred over time		27,537		38,872
	$	235,114	$	93,738
Type of Product and Services
New technology products	$	203,049	$	12,479
Legacy products		29,592		59,867
Turnkey services and other		2,473		21,392
	$	235,114	$	93,738

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

(In thousands)	June 30,			June 30,
	201 9			2018
Accounts receivable	$	55,607		$	51,018
Less: Allowance for doubtful accounts		(879	)		(409	)
Accounts receivable, net	$	54,728		$	50,609

Property, Plant and Equipment [Table Text Block]

Buildings (in years)	28	-	40
Machinery and equipment (in years)	3	-	10
Computer software (in years)	3	-	8

Schedule of Product Warranty Liability [Table Text Block]

(In thousands)	June 30, 201 9			June 30, 2018
Balance at beginning of the period	$	6,876		$	7,560
Additions charged to expense		5,190			5,181
Deductions for repairs and replacements		(4,379	)		(5,865	)
Balance at end of the period	$	7,687		$	6,876

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

( In thousands)	Balance as of June 30, 2018		Adjustments			Opening Balance as of July 1, 2018
Assets:
Accounts receivable, net	$	50,609	$	4,935		$	55,544
Inventories, net	$	50,994	$	(4,167	)	$	46,827
Other long-term assets, net	$	9,786	$	(177	)	$	9,609
Shareholders’ Equity:
Retained earnings	$	15,124	$	591		$	15,715