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Note 2 - Acquisitions and Dispositions - Pro Forma Effects (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014
Infitrak Acquisition [Member] |  |  |
Diluted (in dollars per share) | $ 3.05 | $ 2.72 |
Revenues | $ 86,499 | $ 74,379 |
Net income | $ 11,471 | $ 9,944 |
Basic (in dollars per share) | $ 3.18 | $ 2.82 |
North Bay Acquisition [Member] |  |  |
Diluted (in dollars per share) | $ 3.05 | $ 2.79 |
Revenues | $ 86,053 | $ 75,649 |
Net income | $ 11,463 | $ 10,182 |
Basic (in dollars per share) | $ 3.18 | $ 2.89 |
PCD Acquisition [Member] |  |  |
Diluted (in dollars per share) |  | $ 2.65 | $ 2.63
Revenues |  | $ 73,068 | $ 56,541
Net income |  | $ 9,673 | $ 9,512
Basic (in dollars per share) |  | $ 2.75 | $ 2.76
BGI [Member] |  |  |
Diluted (in dollars per share) |  | $ 2.65 | $ 3.09
Revenues |  | $ 71,648 | $ 60,388
Net income |  | $ 9,661 | $ 11,141
Basic (in dollars per share) |  | $ 2.74 | $ 3.23

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- Definition 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. + 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=79982066&loc=d3e1392-128463 + Details
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- Definition 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. + 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=79982066&loc=d3e1392-128463 + Details
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- Definition The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period. + 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=79982066&loc=d3e1392-128463 + Details
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- Definition The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period. + 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=79982066&loc=d3e1392-128463 + Details
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