Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cost of product revenues	$ 37,524	$ 49,164
Cost of product revenues (excluding intangible asset amortization)	27,229	45,476
Intangible asset amortization	$ 10,295	3,688
Adjustment
Cost of product revenues		(49,164)
Cost of product revenues (excluding intangible asset amortization)		45,476
Intangible asset amortization		$ 3,688