Note 7 - Fair Value Measurements (Details) - USD ($)	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Note 7 - Fair Value Measurements (Details) [Line Items]
Liabilities, Fair Value Disclosure, Nonrecurring	$ 0	$ 0
Minimum [Member]
Note 7 - Fair Value Measurements (Details) [Line Items]
Federal Funds, Maturity	1 day
Maximum [Member]
Note 7 - Fair Value Measurements (Details) [Line Items]
Federal Funds, Maturity	3 days