Stock Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock option grants	$ 428	$ 33	$ 469	$ 110
Annual director stock award	683	0	683	445
Stock based compensation expense	$ 1,111	$ 33	$ 1,152	$ 555

Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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