Note 5 - Intangibles (Detail) - Intangible assets (USD $)	9 Months Ended
Sep. 30, 2012	Dec. 31, 2011
Finite Lived Intangible Assets	$ 2,246,000	$ 2,555,000
Minimum [Member] \| Customer Relationships [Member]
Finite Lived Intangible Assets	15 years
Maximum [Member] \| Customer Relationships [Member]
Finite Lived Intangible Assets	20 years
Customer Relationships [Member]
Finite Lived Intangible Assets	2,007,000	2,191,000
Trade Secrets [Member]
Finite Lived Intangible Assets	$ 239,000	$ 364,000
Finite Lived Intangible Assets	8 years

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

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=7658586&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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