Other Stock-Based Compensation (Details) - USD ($)		1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	May 21, 2015	Feb. 29, 2016	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Equity Incentive Plan
Options (in shares)				0		0
2015 Equity Incentive Plan
Equity Incentive Plan
Number of shares available for issuance under the EIP							692,885
Expiration period after grant date	10 years
Restricted stock (in shares)							0
2015 Equity Incentive Plan | Maximum
Equity Incentive Plan
Vesting rate per year (as a percent)	20.00%
2015 Equity Incentive Plan | Minimum
Equity Incentive Plan
Vesting period (in years)	1 year
Directors and certain key senior executives | Options
Equity Incentive Plan
Options (in shares)		91,225
Options, strike price (in dollars per share)		$ 12.41
Vesting period (in years)		5 years
Grant-date fair value of stock options (in dollars per share)		$ 2.59
Stock-based compensation expense			$ 12,000		$ 18,000
Unrecognized salary and employee benefits cost			219,000		219,000
Directors and certain key senior executives | Restricted Stock
Equity Incentive Plan
Restricted stock (in shares)		39,045
Vesting period (in years)		5 years
Stock-based compensation expense			24,000		36,000
Unrecognized salary and employee benefits cost			$ 448,000		$ 448,000