Note 6 - Related Party Transactions (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Feb. 08, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Stock Issued During Period, Shares, New Issues	3,285,550
Shares Issued, Price Per Share	$ 7
Directors, Executive Officers and Their Related Parties [Member]
Related Party Deposit Liabilities		$ 90,500		$ 90,500		$ 115,500
Related Party Deposit Liabilities, Increase (Decrease)				(25,000)
Related Party Transactions, Interest Paid on Deposits				241	$ 157
Related Party Transaction, Expenses from Transactions with Related Party		500	$ 600	1,000	1,000
Related Party Transaction, Subordinated Debt, Accelerated Partial Principal Repayment	$ 5,000
Related Party Transaction, Interest Paid	3,100
Related Party Transactions, Subordinated Debt						$ 3,100
Interest Expense, Related Party	$ 27		$ 35		$ 70
Stock Issued During Period, Shares, New Issues	340,600
Shares Issued in Transaction as a Percentage of Total Shares Issued	10.40%
Directors, Executive Officers and Their Related Parties [Member] | Nonperforming Financial Instruments [Member]
Due from Related Parties, Total		$ 0		$ 0