Note 3 - Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2016	Mar. 31, 2016
Gross Carrying Amount	$ 10,887	$ 10,887
Accumulated Amortization	(4,407)	(2,876)
Foreign Currency Translation Adjustment	(134)
Net Carrying Value	6,346	8,011
Developed Technology Rights [Member]
Gross Carrying Amount	5,034	5,034
Accumulated Amortization	(2,091)	(1,367)
Foreign Currency Translation Adjustment	(78)
Net Carrying Value	2,865	3,667
Customer Relationships [Member]
Gross Carrying Amount	5,853	5,853
Accumulated Amortization	(2,316)	(1,509)
Foreign Currency Translation Adjustment	(56)
Net Carrying Value	$ 3,481	$ 4,344