Note 11 - Revenue by Primary Geographic Operating Region (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015	Jun. 30, 2014
North America [Member] | Power Supplies [Member]
North America	$ 1,001	$ 1,145	$ 2,185	$ 2,122
North America [Member] | Tape Libraries [Member]
North America	1,859	2,189	3,744	3,982
North America [Member]
North America	2,860	3,334	5,929	6,104
Europe [Member] | Power Supplies [Member]
North America	487	671	1,333	1,232
Europe [Member] | Tape Libraries [Member]
North America	226	418	862	760
Europe [Member]
North America	713	1,089	2,195	1,992
Asia Pacific [Member] | Power Supplies [Member]
North America	975	1,136	2,812	2,520
Asia Pacific [Member] | Tape Libraries [Member]
North America	236	1,015	1,357	121
Asia Pacific [Member]
North America	$ 1,211	$ 2,151	$ 4,169	$ 2,641
Other Geographic Areas [Member] | Power Supplies [Member]
North America
Other Geographic Areas [Member] | Tape Libraries [Member]
North America	$ 140	$ 274	$ 609	$ 204
Other Geographic Areas [Member]
North America	140	274	609	204
Power Supplies [Member]
North America	2,463	2,952	6,330	5,874
Tape Libraries [Member]
North America	2,461	3,896	6,572	5,067
North America	$ 4,924	$ 6,848	$ 12,902	$ 10,941