Income Taxes - Summary of Components of the Provision for Income Tax (Benefit) Expense From Continuing Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Current:
Federal	$ 73	$ 212
State and local, net of federal income tax benefit	81	65
Foreign	1,952	2,299
Total	2,106	2,576
Deferred:
Federal	(1,785)	(8,804)
State and local, net of federal income tax benefit	(1,721)	(243)
Total	(3,506)	(9,047)
Total income benefit expense, from continuing operations	$ (1,400)	$ (6,471)