Note 2 - Pro Forma Effects (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Infitrak Acquisition [Member]
Revenues	$ 86,499	$ 74,379
Net income	$ 11,471	$ 9,944
Basic (in dollars per share)	$ 3.18	$ 2.82
Diluted (in dollars per share)	$ 3.05	$ 2.72
North Bay Acquisition [Member]
Revenues	$ 86,053	$ 75,649
Net income	$ 11,463	$ 10,182
Basic (in dollars per share)	$ 3.18	$ 2.89
Diluted (in dollars per share)	$ 3.05	$ 2.79
PCD Acquisition [Member]
Revenues		$ 73,068	$ 56,541
Net income		$ 9,673	$ 9,512
Basic (in dollars per share)		$ 2.75	$ 2.76
Diluted (in dollars per share)		$ 2.65	$ 2.63
BGI [Member]
Revenues		$ 71,648	$ 60,388
Net income		$ 9,661	$ 11,141
Basic (in dollars per share)		$ 2.74	$ 3.23
Diluted (in dollars per share)		$ 2.65	$ 3.09
Amega Scientific Corporation [Member]
Revenues			$ 56,451	$ 50,372
Net income			$ 10,002	$ 9,508
Basic (in dollars per share)			$ 2.90	$ 2.83
Diluted (in dollars per share)			$ 2.77	$ 2.65
TempSys Inc [Member]
Revenues			$ 55,129	$ 49,705
Net income			$ 9,132	$ 8,100
Basic (in dollars per share)			$ 2.65	$ 2.41
Diluted (in dollars per share)			$ 2.53	$ 2.25

The pro forma basic 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=65885119&loc=d3e1392-128463

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