Note 14 - Employee Benefit Plans (Details) - Profit Sharing Contributions (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Profit Sharing Contributions [Abstract]
Matching contribution	$ 1,179,979	$ 1,129,726	$ 1,014,418
Discretionary contribution	198,800	186,000	188,700
	$ 1,378,779us-gaap_PensionContributions	$ 1,315,726us-gaap_PensionContributions	$ 1,203,118us-gaap_PensionContributions

The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

Name:	us-gaap_PensionContributions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration