Taxes (Schedule of Components of Income Tax) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current:
Federal	$ (36)	$ 86	$ 835
State	124	136	31
Total current	88	222	866
Deferred:
Federal	667	(52,309)	(36,162)
State	(507)	(389)	41
Total deferred	160	(52,698)	(36,121)
Provision for (benefit from) income taxes	$ 248	$ (52,476)	$ (35,255)