Note 3 - Business Segment Information (Details) - Summarized Financial Information by Reportable Business Segments (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
Segment Reporting Information [Line Items]
Net Sales	$ 80,486	[1]	$ 74,719	[1]
Operating Income (Loss)	2,839		3,027
Capital Expenditures	1,230		1,336
Depreciation and Amortization	1,408		1,850
Lighting Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	59,471		55,791
Operating Income (Loss)	3,811		4,513
Capital Expenditures	491		316
Depreciation and Amortization	706		1,165
Graphics Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	14,008		10,745
Operating Income (Loss)	163		(355)
Capital Expenditures	57		218
Depreciation and Amortization	221		222
Electronics Components Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	5,080		5,754
Operating Income (Loss)	972		786
Capital Expenditures	70		133
Depreciation and Amortization	366		320
All Other Category [Member]
Segment Reporting Information [Line Items]
Net Sales	1,927		2,429
Operating Income (Loss)	4		(2)
Capital Expenditures	29		30
Depreciation and Amortization	40		47
Corporate and Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	(2,111)		(1,915)
Capital Expenditures	583		639
Depreciation and Amortization	$ 75		$ 96

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