Note 6 - Fair Value (Detail) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Impaired Financing Receivable, Recorded Investment	$ 25,161,521	$ 29,859,163
Estimate of Fair Value, Fair Value Disclosure [Member]
Impaired Financing Receivable, Recorded Investment	$ 12,832,751

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 14A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524

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