Quarterly Financial Data (Unaudited) (Schedule of Quarterly Financial Information) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Total interest income	$ 3,931	$ 3,953	$ 3,826	$ 3,841	$ 3,726	$ 3,627	$ 3,588	$ 3,558	$ 15,551	$ 14,499
Total interest expense	525	534	518	493	498	480	503	486	2,070	1,967
Net interest income	3,406	3,419	3,308	3,348	3,228	3,147	3,085	3,072	13,481	12,532
Provision (credit) for loan losses	213	208	11	(67)	104	357	481	233	365	1,175
Noninterest income	466	523	555	452	478	538	443	431	464	459
Noninterest expense	3,276	3,024	2,950	2,908	2,823	2,879	2,782	2,703	12,158	11,187
Income before income taxes	383	710	902	959	779	449	265	567	2,954	2,060
Federal income tax expense	68	160	228	252	187	77	22	127	708	413
Net income	$ 315	$ 550	$ 674	$ 707	$ 592	$ 372	$ 243	$ 440	$ 2,246	$ 1,647
Earnings per share
Basic and diluted	$ 0.12	$ 0.20	$ 0.24	$ 0.26	$ 0.22	$ 0.13	$ 0.09	$ 0.16	$ 0.82	$ 0.60