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Note 5 - Other Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Intellectual Property [Member] | Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 10 years | 10 years
Intellectual Property [Member] | Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 16 years | 16 years
Intellectual Property [Member] |  |
Carrying Amount | $ 7,364 | $ 7,210
Accumulated Amortization | 3,093 | 2,362
Net | $ 4,271 | $ 4,848
Trade Names [Member] | Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 3 years | 3 years
Trade Names [Member] | Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 10 years | 10 years
Trade Names [Member] |  |
Carrying Amount | $ 3,474 | $ 3,158
Accumulated Amortization | 1,271 | 863
Net | $ 2,203 | $ 2,295
Customer Relationships [Member] | Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 7 years | 7 years
Customer Relationships [Member] | Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 10 years | 10 years
Customer Relationships [Member] |  |
Carrying Amount | $ 48,782 | $ 36,408
Accumulated Amortization | 15,228 | 10,752
Net | $ 33,554 | $ 25,656
Noncompete Agreements [Member] | Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 3 years | 3 years
Noncompete Agreements [Member] | Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 10 years | 10 years
Noncompete Agreements [Member] |  |
Carrying Amount | $ 1,846 | $ 1,286
Accumulated Amortization | 1,077 | 854
Net | $ 769 | 432
Minimum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 3 years |
Maximum [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 16 years |
Carrying Amount | $ 61,466 | 48,062
Accumulated Amortization | 20,669 | 14,831
Net | $ 40,797 | $ 33,231
Finite-Lived Intangible Asset, Useful Life |  |

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Details
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- Details
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- Details
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- Details
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