Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities, less than 12 months	40	13
Fair value, less than 12 months	$ 96,193	$ 59,338
Gross unrealized losses, less than 12 months	$ 612	$ 209
Number of securities, 12 months or greater	3	12
Fair value, 12 months or greater	$ 1,637	$ 47,943
Gross unrealized losses, 12 months or greater	$ 126	$ 559
Number of securities	43	25
Fair value	$ 97,830	$ 107,281
Gross unrealized losses	$ 738	$ 768
US Government Agencies Debt Securities [Member]
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities, less than 12 months	1	2
Fair value, less than 12 months	$ 7,419	$ 9,513
Gross unrealized losses, less than 12 months	$ 1	$ 47
Number of securities, 12 months or greater	0	0
Fair value, 12 months or greater	$ 0	$ 0
Gross unrealized losses, 12 months or greater	$ 0	$ 0
Number of securities	1	2
Fair value	$ 7,419	$ 9,513
Gross unrealized losses	$ 1	$ 47
US States and Political Subdivisions Debt Securities [Member]
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities, less than 12 months	23	0
Fair value, less than 12 months	$ 32,663	$ 0
Gross unrealized losses, less than 12 months	$ 289	$ 0
Number of securities, 12 months or greater	1	1
Fair value, 12 months or greater	$ 258	$ 254
Gross unrealized losses, 12 months or greater	$ 5	$ 3
Number of securities	24	1
Fair value	$ 32,921	$ 254
Gross unrealized losses	$ 294	$ 3
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities	17
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Residential Mortgage [Member]
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities, less than 12 months	2	1
Fair value, less than 12 months	$ 1,039	$ 653
Gross unrealized losses, less than 12 months	$ 4	$ 1
Number of securities, 12 months or greater	0	0
Fair value, 12 months or greater	$ 0	$ 0
Gross unrealized losses, 12 months or greater	$ 0	$ 0
Number of securities	2	1
Fair value	$ 1,039	$ 653
Gross unrealized losses	$ 4	$ 1
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Commercial Loan [Member]
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities, less than 12 months	13	7
Fair value, less than 12 months	$ 50,068	$ 32,513
Gross unrealized losses, less than 12 months	$ 314	$ 105
Number of securities, 12 months or greater	0	3
Fair value, 12 months or greater	$ 0	$ 8,693
Gross unrealized losses, 12 months or greater	$ 0	$ 148
Number of securities	13	10
Fair value	$ 50,068	$ 41,206
Gross unrealized losses	$ 314	$ 253
Residential Mortgage Backed Securities [Member]
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities, less than 12 months	1	3
Fair value, less than 12 months	$ 5,004	$ 16,659
Gross unrealized losses, less than 12 months	$ 4	$ 56
Number of securities, 12 months or greater	0	6
Fair value, 12 months or greater	$ 0	$ 37,619
Gross unrealized losses, 12 months or greater	$ 0	$ 285
Number of securities	1	9
Fair value	$ 5,004	$ 54,278
Gross unrealized losses	$ 4	$ 341
Corporate Debt Securities [Member]
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities, less than 12 months	0	0
Fair value, less than 12 months	$ 0	$ 0
Gross unrealized losses, less than 12 months	$ 0	$ 0
Number of securities, 12 months or greater	1	1
Fair value, 12 months or greater	$ 431	$ 420
Gross unrealized losses, 12 months or greater	$ 69	$ 80
Number of securities	1	1
Fair value	$ 431	$ 420
Gross unrealized losses	$ 69	$ 80
Negotiable Certificates of Deposit [Member]
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities, less than 12 months	0	0
Fair value, less than 12 months	$ 0	$ 0
Gross unrealized losses, less than 12 months	$ 0	$ 0
Number of securities, 12 months or greater	0	0
Fair value, 12 months or greater	$ 0	$ 0
Gross unrealized losses, 12 months or greater	$ 0	$ 0
Number of securities	0	0
Fair value	$ 0	$ 0
Gross unrealized losses	$ 0	$ 0
Equity Securities [Member]
Note 6 - Securities (Details) - Available-for-sale Securities in a Continuous Unrealized Loss Position [Line Items]
Number of securities, less than 12 months	0	0
Fair value, less than 12 months	$ 0	$ 0
Gross unrealized losses, less than 12 months	$ 0	$ 0
Number of securities, 12 months or greater	1	1
Fair value, 12 months or greater	$ 948	$ 957
Gross unrealized losses, 12 months or greater	$ 52	$ 43
Number of securities	1	1
Fair value	$ 948	$ 957
Gross unrealized losses	$ 52	$ 43