Note 11 - Segment Information - Total Assets by Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Power Supplies [Member]
Cash and Marketable Securities:
Power Supplies and Data Storage	$ 2,435	$ 2,329
Property and Equipment
Gross fixed assets	568	624
Less: accumulated depreciation and amortization	(510)	(491)
Net power supply fixed assets	58	133
Tape Libraries [Member]
Cash and Marketable Securities:
Power Supplies and Data Storage	3,553	3,231
Property and Equipment
Gross fixed assets	1,240	2,081
Less: accumulated depreciation and amortization	(760)	(1,551)
Net power supply fixed assets	480	530
Cash and cash equivalents	$ 4,696	5,462
Fair Value		1,763
Total Cash and Marketable Securities	$ 4,696	7,225
Total Power Supplies and Data Storage	5,988	5,560
Total Assets	$ 10,684	$ 12,785