Note 4 - Trading Account Assets (Details) $ in Thousands	1 Months Ended	6 Months Ended
	Jan. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)
Note 4 - Trading Account Assets (Details) [Line Items]
Trading Securities, Cost		$ 5,000
Payments to Acquire Trading Securities Held-for-investment	$ 4,500
Municipal Bonds [Member] | Not Rated [Member] | Fitch, A+ Rating [Member] | Not Rated [Member]
Note 4 - Trading Account Assets (Details) [Line Items]
Number of Trading Security		1
Trading Securities, Debt		$ 16