Note 11 - Segment Information (Detail) - Revenue by primary geographic operating region (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Total Revenue:
Revenues by geographic operating regions	$ 17,081	$ 18,302	$ 15,270
Power Supply [Member] | North America [Member]
Total Revenue:
Revenues by geographic operating regions	3,327	4,105	2,972
Power Supply [Member] | Europe [Member]
Total Revenue:
Revenues by geographic operating regions	1,587	1,326	861
Power Supply [Member] | Asia Pacific [Member]
Total Revenue:
Revenues by geographic operating regions	4,506	3,024	1,950
Power Supply [Member] | Total [Member]
Total Revenue:
Revenues by geographic operating regions	9,420	8,455	5,783
Power Supply [Member]
Total Revenue:
Revenues by geographic operating regions	9,420	8,455	5,783
Library [Member] | North America [Member]
Total Revenue:
Revenues by geographic operating regions	5,712	7,595	7,204
Library [Member] | Europe [Member]
Total Revenue:
Revenues by geographic operating regions	1,441	1,874	1,622
Library [Member] | Asia Pacific [Member]
Total Revenue:
Revenues by geographic operating regions	218	103	31
Library [Member] | Other Country [Member]
Total Revenue:
Revenues by geographic operating regions	290	275	630
Library [Member] | Total [Member]
Total Revenue:
Revenues by geographic operating regions	7,661	9,847	9,487
North America [Member]
Total Revenue:
Revenues by geographic operating regions	9,039	11,700	10,176
Europe [Member]
Total Revenue:
Revenues by geographic operating regions	3,028	3,200	2,483
Asia Pacific [Member]
Total Revenue:
Revenues by geographic operating regions	4,724	3,127	1,981
Other Country [Member]
Total Revenue:
Revenues by geographic operating regions	290	275	630
Total [Member]
Total Revenue:
Revenues by geographic operating regions	$ 17,081	$ 18,302	$ 15,270