Other Assets and Liabilities - Other Non-Current Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Deferred tax assets	$ 29,427	$ 23,029	$ 10,342	$ 13,102
Long-term deposits	1,477	1,477
Guarantee from Armistice (see Note 17)	1,367	5,697
Right of use assets at contract manufacturing organizations	6,428	5,894
Other	575	49
Total	$ 39,274	$ 36,146