Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Other Long-Term Liabilities
Net deferred tax liabilities related to IPR&D (Note 11)	$ 1,613	$ 1,840
Contingent milestones (Note 3)	7,107	8,267
Deferred revenue (Note 10)	601	3,386
Total	9,321	13,493
Less current portion	(1,721)	(3,372)
Long-term portion	$ 7,600	$ 10,121