Income Taxes Income Tax Provision Included in Other Income Expense on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Federal	$ (542)	$ 48	$ 60
State	412	625	465
Federal	(80)	237	(6)
State	201	(91)	(192)
Provision for income taxes	$ (9)	$ 819	$ 327