Note 8 - Income Taxes (Details Textual) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 1,500,000	$ 1,500,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	98,500	98,500
Unrecognized Tax Benefits, Income Tax Penalties Accrued	$ 0	$ 0