Note 5 - Income taxes (Tables)

12 Months Ended

Dec. 31, 2013

Income Tax Disclosure [Abstract]

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2013					2012
	Current		Non-Current			Current		Non-Current
Deferred tax assets	$	--	$	--		$	--	$	--
Deferred tax liabilities		--		(181,818	)		--		(181,818	)
	$	--	$	(181,818	)	$	--	$	(181,818	)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2013			2012
Income tax on income before extraordinary item:
Tax at statutory rates	$	471,109		$	900,944
Tax effect of the following:
Statutory depletion		(87,526	)		(130,489	)
Dividend exclusion		--			--
State income tax		33,576			71,525
Other		(1,282	)		40
Income tax on income before extraordinary item	$	415,877		$	842,020
Income tax on extraordinary item:
Tax at statutory rates	$	--		$	233,762
Tax effect of the following:
State income tax		--		$	22,085
Other		--		$	153
Income tax on extraordinary item	$	--		$	256,000

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2013					2012
	Current		Non-Current			Current		Non-Current
Conversion of investment from tax cash basis to accrual basis for financial reporting	$	--		--		$	--		--
Unrealized net loss (gain) on marketable securities		--		--			--		--
Casualty loss		--		(121,239	)		--		(121,239	)
Deferred gain		--		(60,579	)		--		(60,579	)
	$	--		(181,818	)	$	--		(181,818	)