Note 12 - Fair Value Disclosures - Financial Assets and Financial Liabilities Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Impaired loans, fair value
Repossessed assets, fair value
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Impaired loans, fair value
Repossessed assets, fair value
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Impaired loans, fair value
Repossessed assets, fair value
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Impaired loans, fair value
Repossessed assets, fair value
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Nonrecurring [Member]
Impaired loans, fair value	2,059
Repossessed assets, fair value	565
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Impaired loans, fair value		2,028
Repossessed assets, fair value		595
Fair Value, Measurements, Nonrecurring [Member]
Impaired loans, fair value	2,059
Repossessed assets, fair value	$ 565
Fair Value, Measurements, Recurring [Member]
Impaired loans, fair value		2,028
Repossessed assets, fair value		$ 595