Note 3 - Investment Securities (Details) - Investment Securities Available for Sale $ in Thousands	Sep. 30, 2015 USD ($)
Continuous loss position less than twelve months:
Number of investment positions - Less than twelve months	20
Fair value - Less than twelve months	$ 11,703
Gross unrealized losses - Less than twelve months	$ 55
Continuous loss position more than twelve months:
Number of investment positions - More than twelve months	18
Fair value - More than twelve months	$ 12,879
Gross unrealized losses - More than twelve months	$ 131
Total securities available for sale	38
Total securities available for sale	$ 24,582
Total securities available for sale	$ 186
US Government Agencies Debt Securities [Member]
Continuous loss position less than twelve months:
Number of investment positions - Less than twelve months	2
Fair value - Less than twelve months	$ 1,398
Gross unrealized losses - Less than twelve months	$ 2
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Continuous loss position less than twelve months:
Number of investment positions - Less than twelve months	10
Fair value - Less than twelve months	$ 7,284
Gross unrealized losses - Less than twelve months	$ 22
Continuous loss position more than twelve months:
Number of investment positions - More than twelve months	4
Fair value - More than twelve months	$ 4,294
Gross unrealized losses - More than twelve months	$ 26
Municipal Notes [Member]
Continuous loss position less than twelve months:
Number of investment positions - Less than twelve months	8
Fair value - Less than twelve months	$ 3,021
Gross unrealized losses - Less than twelve months	$ 31
Continuous loss position more than twelve months:
Number of investment positions - More than twelve months	5
Fair value - More than twelve months	$ 2,336
Gross unrealized losses - More than twelve months	$ 48
Agency Collateralized Mortgage Obligations [Member]
Continuous loss position more than twelve months:
Number of investment positions - More than twelve months	9
Fair value - More than twelve months	$ 6,249
Gross unrealized losses - More than twelve months	$ 57