Other Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
VAT receivable	$ 4,925	$ 7,854
Prepaid income tax asset	3,616	5,090
Other	3,261	2,664
Total other current assets	$ 11,802	$ 15,608