Premises and Equipment - Summary of Premises and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Premises and equipment, gross	$ 8,766,000	$ 8,272,000
Less accumulated depreciation and amortization	(3,416,000)	(3,376,000)
Premises and equipment, net	$ 5,350,226	4,896,447
Minimum
Property Plant And Equipment [Line Items]
Premises and equipment, useful lives	3 years
Maximum
Property Plant And Equipment [Line Items]
Premises and equipment, useful lives	39 years
Buildings
Property Plant And Equipment [Line Items]
Premises and equipment, useful lives	39 years
Premises and equipment, gross	$ 3,586,000	3,586,000
Leasehold improvements
Property Plant And Equipment [Line Items]
Premises and equipment, gross	$ 1,171,000	1,174,000
Leasehold improvements | Minimum
Property Plant And Equipment [Line Items]
Premises and equipment, useful lives	2 years
Leasehold improvements | Maximum
Property Plant And Equipment [Line Items]
Premises and equipment, useful lives	10 years
Furniture and equipment
Property Plant And Equipment [Line Items]
Premises and equipment, gross	$ 2,055,000	2,332,000
Furniture and equipment | Minimum
Property Plant And Equipment [Line Items]
Premises and equipment, useful lives	3 years
Furniture and equipment | Maximum
Property Plant And Equipment [Line Items]
Premises and equipment, useful lives	7 years
Land
Property Plant And Equipment [Line Items]
Premises and equipment, gross	$ 1,180,000	$ 1,180,000
Leasehold improvements in process
Property Plant And Equipment [Line Items]
Premises and equipment, gross	$ 774,000