Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Net capital loss	$ 70,000	$ 222,000	$ 36,000
Loss expiration date		Dec. 31, 2020	Dec. 31, 2019
Deferred tax assets	66,000	$ 90,000
Cumulative net capital losses	627,000	1,137,000
Unrecognized tax benefit	0	0
Income tax matters accrued interest or penalties	0	0
Expense relate to interest and penalties	$ 0	$ 0	$ 0
Income tax examination, open tax year description	Tax years 2013 through 2015 remain open to federal and state examination.
Net operating loss carryforward, amount	$ 1,793,000
Annual limit on utilization of operating loss carryforward	1,455,000
Farmers Citizens Bank [Member]
Business Acquisition [Line Items]
Net operating loss carryforward, amount	$ 6,367,000
Net operating loss carryforward, expiration year	2033