Note 4 - Investment in Marketable Securities (Details) - Historical Cost and Estimated Fair Value of Available for Sale Securities (USD $)	6 Months Ended	12 Months Ended
Jun. 30, 2013	Dec. 31, 2012
Note 4 - Investment in Marketable Securities (Details) - Historical Cost and Estimated Fair Value of Available for Sale Securities [Line Items]
Mortgage-backed Securities Fair Value	$ 3,776,530	$ 4,516,472
Gross Unrealized Gains [Member]
Note 4 - Investment in Marketable Securities (Details) - Historical Cost and Estimated Fair Value of Available for Sale Securities [Line Items]
Mortgage-backed Securities Amortized Cost	3,796,896	4,442,185
Fair Value [Member]
Note 4 - Investment in Marketable Securities (Details) - Historical Cost and Estimated Fair Value of Available for Sale Securities [Line Items]
Mortgage-backed Securities Gross Unrealized Gains	$ (20,366)	$ 74,287

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

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-Publisher FASB

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-02.2)

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Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 2

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-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563

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