Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 01, 2020	Mar. 31, 2020
Summary of Significant Accounting Policies
Amortization period of the asset		true
Payment terms number of days		30 days
Shelf life of inventory		4 years
Consumption period of API		8 years
Shelf-life of API		4 years
Cash, Cash Equivalents and Available-for-Sale Securities
Impairment for available for debt securities		$ 0
ASU 16-13
Cash, Cash Equivalents and Available-for-Sale Securities
Impairment for available for debt securities	$ 0
Rucaparib
Summary of Significant Accounting Policies
Shelf life of inventory		4 years