Note 8 - Borrowed Funds - Long-term Borrowing Maturities (Details) - Federal Home Loan Bank of Pittsburgh [Member] - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Long-term borrowings from FHLB - Pittsburgh	$ 4,256	$ 11,454
Federal Home Loan Bank Borrowings Loan Maturing in 2017 With Rate of 6.83% [Member]
Long-term borrowings from FHLB - Pittsburgh	0	4
Federal Home Loan Bank Borrowings Loan Maturing in 2017 with Rate of 3.81% [Member]
Long-term borrowings from FHLB - Pittsburgh	0	10,000
Federal Home Loan Bank Borrowings Loan Maturing in 2018 with Rate of 1.35% [Member]
Long-term borrowings from FHLB - Pittsburgh	3,000	0
Federal Home Loan Bank Borrowings Loan Maturing in 2020 with Rate of 4.79% [Member]
Long-term borrowings from FHLB - Pittsburgh	510	646
Federal Home Loan Bank Borrowings Loan Maturing in 2025 with Rate of 4.91% [Member]
Long-term borrowings from FHLB - Pittsburgh	$ 746	$ 804