Retirement Plans - Schedule of Costs of Retirement Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Defined Contribution Plan Disclosure
Expenses associated with contributions made	$ 12	$ 695
United States
Defined Contribution Plan Disclosure
Expenses associated with contributions made	(138)	550
Canada
Defined Contribution Plan Disclosure
Expenses associated with contributions made	39	38
United Kingdom
Defined Contribution Plan Disclosure
Expenses associated with contributions made	$ 111	$ 107