Income Taxes - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended			24 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Federal statutory tax rate									21.00%	21.00%	35.00%
Tax Cuts And Jobs Act Of 2017, change in tax rate, provisional income tax benefit											$ 5,900
Deferred tax liabilities, provisional income tax benefit (dollars per share)											$ 0.21
Valuation allowance per share (in dollars per share)					$ 0.39					$ 0.39
Valuation allowance	$ 16,960				$ 15,815				$ 16,960	$ 15,815		$ 16,960
Goodwill impairment charges					69,500					69,483	$ 0
(Loss) income before income taxes	1,107	$ 4,506	$ (1,773)	$ (7,331)	(106,727)	$ (9,427)	$ 3,909	$ 5,590	(3,491)	(106,655)	(4,141)
Goodwill impairment, permanent tax difference										1,200
Increase in valuation allowance									1,100	11,000
Unrecognized tax benefit	1,614				1,614				1,614	1,614	1,614	1,614
Accrued interest and penalties on unrecognized tax benefits	0				$ 0				0	$ 0	0	0
Federal
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 44,100								$ 44,100		$ 7,500	44,100
Operating losses incurred												$ 36,600