Note 3 - Acquisition - Proforma Information (Details) - Ambrell [Member] - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016
Net revenues	$ 74,421	$ 60,410
Net earnings	$ 1,637	$ 1,796
Diluted earnings per share (in dollars per share)	$ 0.16	$ 0.17

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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