Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale	Jun. 30, 2015
Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale [Line Items]
Credit Rating	100.00%
Moody's, Aaa Rating [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale [Line Items]
Credit Rating	8.00%
Moody's Aa1 - Aa3 [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale [Line Items]
Credit Rating	42.00%
Moody's, A1 Rating [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale [Line Items]
Credit Rating	100.00%
Not Rated [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale [Line Items]
Credit Rating	50.00%
Standard & Poor's, AAA Rating [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale [Line Items]
Credit Rating	17.00%
Standard and Poor's AA+ - AA- [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale [Line Items]
Credit Rating	57.00%
Standard & Poor's, A+ Rating [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale [Line Items]
Credit Rating	2.00%
Not Rated [Member]
Note 5 - Investment Securities Available-for-sale (Details) - Ratings by Segment of Investment Securities Available for Sale [Line Items]
Credit Rating	24.00%