Note 5 - Other Assets - Other Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015
Marketable equity securities	$ 1,545	$ 1,737
Auction rate preferred securities	350	350
Long-term equity investments	11,042	11,041
Other items	734	576
Total	$ 13,671	$ 13,704