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

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.

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_IntellectualPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_TradeNamesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_NoncompeteAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: