Note 12 - Segment Information (Detail) - Segment revenue (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Revenue	$ 3,355	$ 3,555	$ 6,808	$ 8,179
Product [Member] | Storage [Member]
Revenue	1,532	1,098	2,754	2,807
Service [Member] | Storage [Member]
Revenue	594	473	1,281	1,185
Power Supplies [Member]
Revenue	1,229	1,984	2,773	4,187
Storage [Member]
Revenue	$ 2,126	$ 1,571	$ 4,035	$ 3,992