Note 5 - Income taxes (Details) - Income Tax Reconciliation (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 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)
State income tax	33,576	71,525
Other	(1,282)	40
	415,877	842,020
Extraordinary Item [Member]
Income tax on income before extraordinary item:
Tax at statutory rates		233,762
Tax effect of the following:
State income tax		22,085
Other		153
		$ 256,000