Note 3- Business Segment Information (Details) - Summarized Financial Information by Reportable Business Segments (USD $)	3 Months Ended
	Sep. 30, 2014		Sep. 30, 2013
Segment Reporting Information [Line Items]
Net Sales	$ 78,466,000	[1]	$ 80,486,000	[1]
Operating Income (Loss)	2,534,000		2,839,000
Capital Expenditures	970,000		1,230,000
Depreciation and Amortization	1,586,000		1,408,000
Lighting Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	56,521,000		59,471,000
Operating Income (Loss)	4,120,000		3,811,000
Capital Expenditures	587,000		491,000
Depreciation and Amortization	738,000		706,000
Graphics Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	13,811,000		14,008,000
Operating Income (Loss)	(214,000)		163,000
Capital Expenditures	334,000		57,000
Depreciation and Amortization	248,000		221,000
Electronics Components Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	5,880,000		5,080,000
Operating Income (Loss)	739,000		972,000
Capital Expenditures	39,000		70,000
Depreciation and Amortization	322,000		366,000
All Other Category [Member]
Segment Reporting Information [Line Items]
Net Sales	2,254,000		1,927,000
Operating Income (Loss)	84,000		4,000
Capital Expenditures	4,000		29,000
Depreciation and Amortization	33,000		40,000
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	(2,195,000)		(2,111,000)
Capital Expenditures	6,000		583,000
Depreciation and Amortization	$ 245,000		$ 75,000

[1] Net sales are attributed to geographic areas based upon the location of the operation making the sale.