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Note 8 - Segment Information (Details) - Revenues from External Customers (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net revenues from unaffiliated customers:
Revenues from unaffiliated customers	$ 18,540	$ 12,676	$ 34,940	$ 23,894
UNITED STATES
Net revenues from unaffiliated customers:
Revenues from unaffiliated customers	9,698	7,794	18,189	13,824
Foreign [Member]
Net revenues from unaffiliated customers:
Revenues from unaffiliated customers	$ 8,842	$ 4,882	$ 16,751	$ 10,070

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- Definition

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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