Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Weighted Average Grant Date Fair Value [Abstract]
Stock-based compensation expense	$ 45	$ 53	$ 0
Restricted Stock [Member]
Shares [Roll Forward]
Nonvested balance at beginning of period (in shares)		2,245
Issued (in shares)		9,838
Vested (in shares)		0
Forfeited (in shares)		0
Nonvested balance at end of period (in shares)	12,083	12,083		2,245
Weighted Average Grant Date Fair Value [Abstract]
Non-vested balance at beginning of period (in dollars per share)		$ 33.60
Issued (in dollars per share)		25.96
Vested (in dollars per share)		0
Forfeited (in dollars per share)		0
Non-vested balance at end of period (in dollars per share)	$ 27.38	$ 27.38		$ 33.60
Weighted-average remaining vesting period for recognition		1 year 7 months 20 days
Fair value of restricted stock granted		$ 255
Unrecognized stock-based compensation expense	$ 260	$ 260
2016 Stock Incentive Plan [Member]
Employee Service Share-based Compensation [Abstract]
Shares available for grant (in shares)	300,000	300,000
ESPP [Member]
Weighted Average Grant Date Fair Value [Abstract]
Discount from market price at date of purchase		5.00%		5.00%
Total stock purchases under the plan (in shares)		1,940
Shares reserved for issuance (in shares)	243,513	243,513
ESPP [Member] | Minimum [Member]
Weighted Average Grant Date Fair Value [Abstract]
Discount from market price at date of purchase		0.00%
ESPP [Member] | Maximum [Member]
Weighted Average Grant Date Fair Value [Abstract]
Discount from market price at date of purchase		15.00%