Income Taxes Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Operating loss carryforwards	$ 30,600
Operating Loss Carryforwards, Expiration Date	Jan. 01, 2027
Operating Loss Carryforwards, Limitations on Use, Value	$ 500
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of year	89	$ 327	$ 120
Increases (decreases) to tax positions related to prior periods	19	243	91
Increases to tax positions related to the current year	5	5	116
Balance, end of year	$ 113	$ 89	$ 327