Note 5 - Other Assets - Other Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Marketable equity securities	$ 1,771	$ 1,749
Auction rate preferred securities	350	350
Long-term equity method investments	11,589	10,977
Other items, including cost method investments	4,265	686
Total	$ 17,975	$ 13,762