Note 6 - Other Assets - Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Mar. 31, 2016
Marketable equity securities	$ 2,046	$ 1,749
Auction rate preferred securities	350	350
Long-term equity method investments	11,554	10,977
Other items, including cost method investments	3,217	686
Total	$ 17,167	$ 13,762