Income Taxes - Other details (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2020
Income Taxes
Income tax benefit	$ 1,640	$ 1,425
Effective income tax rate reconciliation, at federal statutory income tax rate, percent	21.00%	21.00%
Effective income tax rate reconciliation, state and local income taxes, percent	2.66%	3.22%
Deferred tax assets, valuation allowance	$ 28,351	$ 24,562
Effective Income Tax Rate Reconciliation, Percent	8.20%	6.75%
Undistributed Earnings of Foreign Subsidiaries	$ 0
Tax Year 2018
Income Taxes
Operating loss carryforwards	$ 228,300
Operating loss carryforwards expire date	2037
Limitation on operating loss carryforwards	$ 155,600		$ 155,600
Foreign
Income Taxes
Operating loss carryforwards	25,200
Federal
Income Taxes
Operating loss carryforwards	72,700
Deferred tax assets, valuation allowance	28,400
Change in valuation allowance	3,800
V C N | Foreign
Income Taxes
Operating loss carryforwards	$ 25,200
Scenario, Plan
Income Taxes
Effective income tax rate reconciliation, at federal statutory income tax rate, percent	21.00%