Note 3 - Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Sep. 30, 2017	Mar. 31, 2017
Gross Carrying Amount	$ 10,891	$ 10,891
Accumulated Amortization	(6,155)	(4,946)
Foreign Currency Translation Adjustment	241	(85)
Net Carrying Value	4,977	5,860
Developed Technology Rights [Member]
Gross Carrying Amount	5,034	5,034
Accumulated Amortization	(2,930)	(2,347)
Foreign Currency Translation Adjustment	141	(50)
Net Carrying Value	2,245	2,637
Customer Relationships [Member]
Gross Carrying Amount	5,857	5,857
Accumulated Amortization	(3,225)	(2,599)
Foreign Currency Translation Adjustment	100	(35)
Net Carrying Value	$ 2,732	$ 3,223

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount of foreign currency translation gain (loss) which increases (decreases) assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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