Note 5 - Borrowings - Components of Borrowed Funds (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Junior subordinated debentures	$ 98,244	$ 57,219
Total borrowed funds	98,244	57,219
Junior Subordinated Debt [Member]
Junior subordinated debentures	10,310	10,310
Federal Reserve Bank Advances [Member]
Short-term Debt, Total	10,000		$ 0
Federal Home Loan Bank Advances [Member]
Short-term Debt, Total	77,934	46,909
Federal Home Loan Bank Advances [Member] | FHLB of Pittsburgh Advances - Overnight [Member]
Short-term Debt, Total	35,125	14,100
Federal Home Loan Bank Advances [Member] | FHLB of Pittsburgh Advances - Term [Member]
Short-term Debt, Total	$ 42,809	$ 32,809