Income Taxes - Income tax provision from operations included in consolidated statements of operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ 639	$ 675
State	2	1
Total current tax	641	676
Deferred:
Federal	96	82
State	0	0
Total deferred	96	82
Income tax provision, total	$ 737	$ 758