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+ References

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=56956515&loc=d3e1392-128463

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Note 2 - Acquisitions and Dispositions (Details) - Adjusted Pro Forma Effect of Acquisitions on the Results of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
PCD Acquisition [Member]
Note 2 - Acquisitions and Dispositions (Details) - Adjusted Pro Forma Effect of Acquisitions on the Results of Operations [Line Items]
Revenues	$ 73,068	$ 56,541
Net income	9,673	9,512
Basic	$ 2.75	$ 2.76
Diluted	$ 2.65	$ 2.63
BGI [Member]
Note 2 - Acquisitions and Dispositions (Details) - Adjusted Pro Forma Effect of Acquisitions on the Results of Operations [Line Items]
Revenues	71,648	60,388
Net income	9,661	11,141
Basic	$ 2.74	$ 3.23
Diluted	$ 2.65	$ 3.09
Amega Scientific Corporation [Member]
Note 2 - Acquisitions and Dispositions (Details) - Adjusted Pro Forma Effect of Acquisitions on the Results of Operations [Line Items]
Revenues		56,451	50,372
Net income		10,002	9,508
Basic		$ 2.90	$ 2.83
Diluted		$ 2.77	$ 2.65
TempSys [Member]
Note 2 - Acquisitions and Dispositions (Details) - Adjusted Pro Forma Effect of Acquisitions on the Results of Operations [Line Items]
Revenues		55,129	49,705
Net income		9,132	8,100
Basic		$ 2.65	$ 2.41
Diluted		$ 2.53	$ 2.25
Bios [Member]
Note 2 - Acquisitions and Dispositions (Details) - Adjusted Pro Forma Effect of Acquisitions on the Results of Operations [Line Items]
Revenues			47,216	46,498
Net income			$ 8,471	$ 8,102
Basic			$ 2.52	$ 2.47
Diluted			$ 2.36	$ 2.34