Note 3 - Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017
Foreign Currency Translation Adjustment	$ (111)	$ (85)
Net Carrying Value	5,441	5,860
Gross Carrying Amount	10,891	10,891
Accumulated Amortization	(5,561)	(4,946)
Foreign Currency Translation Adjustment	111	85
Developed Technology Rights [Member]
Foreign Currency Translation Adjustment	(66)	(50)
Net Carrying Value	2,456	2,637
Gross Carrying Amount	5,034	5,034
Accumulated Amortization	(2,644)	(2,347)
Foreign Currency Translation Adjustment	66	50
Customer Relationships [Member]
Foreign Currency Translation Adjustment	(45)	(35)
Net Carrying Value	2,985	3,223
Gross Carrying Amount	5,857	5,857
Accumulated Amortization	(2,917)	(2,599)
Foreign Currency Translation Adjustment	$ 45	$ 35