9. Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Unrealized Securities Gains (Losses) [Member]
Beginning balance	$ (20)	$ 6
Change in unrealized securities gains (losses), net of tax	(131)	(1)
Change in unfunded pension liability, net of tax	0	0
Ending balance	(151)	5
Adjustments Related to Pension Plan [Member]
Beginning balance	(4,122)	(3,171)
Change in unrealized securities gains (losses), net of tax	0	0
Change in unfunded pension liability, net of tax	0	0
Ending balance	(4,122)	(3,171)
Accumulated Other comprehensive Income (Loss) [Member]
Beginning balance	(4,142)	(3,165)
Change in unrealized securities gains (losses), net of tax	(131)	(1)
Change in unfunded pension liability, net of tax	0	0
Ending balance	$ (4,273)	$ (3,166)