Note 4 - Investment in Marketable Securities (Details) (USD $)	6 Months Ended
Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Investments, Debt and Equity Securities [Abstract]
Proceeds from Principal Repayments on Loans and Leases Held-for-investment (in Dollars)	$ 645,296	$ 185,165
Marketable Securities Estimated Yield	2.00%		2.00%
Marketable Securities Adjusted Duration	3 years		4 years

The cash inflow from repayments of the balance excluding interest (principal) on loans receivable and leases held for investment purposes.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

Name:	us-gaap_ProceedsFromPrincipalRepaymentsOnLoansAndLeasesHeldForInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration