Note 12 - Segment Information (Details) - Segment Revenue (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 2,562	$ 2,952	$ 8,192	$ 9,760
Power Supplies [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	1,525	1,969	4,321	4,742
Storage [Member] | Product [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	457	793	2,301	3,547
Storage [Member] | Service [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	580	190	1,570	1,471
Storage [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 1,037	$ 983	$ 3,871	$ 5,018