Note 8 - Fair Value of Financial Instruments (Detail)	Jun. 30, 2012 USD ($)	Mar. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jun. 30, 2011 USD ($)	Mar. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2012 Contingent Purchase Price Original Minimum [Member] EUR (€)	Dec. 31, 2012 Contingent Purchase Price Additional Minimum [Member] EUR (€)
Business Acquisition, Contingent Consideration, Potential Cash Payment	$ 3,702,000	$ 4,397,000	$ 3,739,000	$ 4,148,000	$ 3,960,000	$ 3,689,000	€ 3,000,000	€ 500,000

Amount of potential cash payments that could result from the contingent consideration arrangement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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