Note 17 - Other Noninterest Income and Expense - Summary of Noninterest Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Total other noninterest expenses	$ 4,815	$ 4,753
Customer Bank Card Processing [Member]
Total other noninterest expenses	673	591
Subscriptions [Member]
Total other noninterest expenses	513	481
Internet Banking and Bill Pay [Member]
Total other noninterest expenses	416	365
Telephone and Data Communications [Member]
Total other noninterest expenses	414	476
Correspondent Bank and Courier Fees [Member]
Total other noninterest expenses	395	339
Travel Entertainment and Conferences [Member]
Total other noninterest expenses	337	352
Printing and Supplies [Member]
Total other noninterest expenses	333	291
Pennsylvania Shares and Use Taxes [Member]
Total other noninterest expenses	316	371
Marketing and Advising [Member]
Total other noninterest expenses	292	287
Charitable Contributions [Member]
Total other noninterest expenses	220	181
Regulatory Examinations [Member]
Total other noninterest expenses	207	185
Postage and Freight [Member]
Total other noninterest expenses	134	130
Memberships and Dues [Member]
Total other noninterest expenses	98	99
Other Expenses [Member]
Total other noninterest expenses	$ 467	$ 605