Note 17 - Financial Instruments With Off-balance Sheet Risk (Details Textual)
12 Months Ended
Dec. 31, 2016
USD ($)
Home Equity Line of Credit [Member]  
Line of Credit Facility, Expiration Period 10 years
Standby Letters of Credit, Expire in 2017 [Member]  
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset $ 1,424,000
Standby Letters of Credit, Expire in 2018 [Member]  
Fair Value Disclosure, Off-balance Sheet Risks, Amount, Asset $ 158,000