Note 11 - Segment Information (Details) - Total Assets by Segment (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting, Asset Reconciling Item [Line Items]
Cash and Cash Equivalents	$ 5,462	$ 1,966	$ 7,381	$ 4,970
Marketable Securities	1,763	11,851
Total Cash and Marketable Securities	7,225	13,817
Power Supplies and Tape Libraries	5,560	6,390
Total Assets	12,785	20,207
Power Supplies [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Power Supplies and Tape Libraries	2,329	538
Property and Equipment
Gross fixed assets	624	576
Less: accumulated depreciation and amortization	(491)	(448)
Net fixed assets	133	128
Tape Libraries [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Power Supplies and Tape Libraries	3,231	5,852
Property and Equipment
Gross fixed assets	2,081	2,706
Less: accumulated depreciation and amortization	(1,551)	(2,289)
Net fixed assets	$ 530	$ 417