Note 5 - Other Assets - Unrealized Loss (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Less than 12 Months Gross Unrealized Losses	$ 29	$ 27
Less than 12 Months Fair Value	581	243
12 Months or Greater Gross Unrealized Losses	143	15
12 Months or Greater Fair Value	932	43
Total Gross Unrealized Losses	172	42
Total Fair Value	$ 1,513	$ 286