Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Federal statutory rate	21.00%	21.00%	35.00%
Valuation allowance	$ 30,615	$ 27,331
Deferred tax assets, operating loss carryforwards, federal	11,900	2,400
Deferred tax assets, operating loss carryforwards, state	3,100	900
Accrued interest related to unrecognized tax benefits	100	100	$ 100
Interest expense related to unrecognized tax benefits	100	100	$ 100
Reserve would be reduced due to expiration of statute of limitations within the next 12 months	200
Federal
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carryforwards	56,800	49,300
State
Operating Loss Carryforwards [Line Items]
Income tax net operating loss carryforwards	$ 11,400	$ 15,600