Acquisitions (Details) - USD ($)			3 Months Ended				6 Months Ended
	Apr. 04, 2022	Jan. 04, 2021	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2020
Amounts recorded:
Research and development			$ 218,480,000		$ 77,428,000		$ 337,579,000	$ 184,539,000
Channel
Amounts recorded:
Upfront cash payment	$ 35,000,000
Stock issued in acquisition, number of shares	493,254
Stock issued in acquisition	$ 58,747,000
Potential developmental and regulatory milestones on BHV-7000	325,000,000
Potential developmental and regulatory milestones on Kv7 pipeline development	250,000,000
Potential commercial sales based milestones of BHV-7000	$ 562,500,000
Research and development			93,747,000
Recorded liability			$ 25,000,000				$ 25,000,000
Kleo
Business Acquisition [Line Items]
Fair value of consideration transferred		$ 20,043,000
Issuance of shares		115,836
Amount received per contingent value right upon regulatory approval		$ 1
Contingent value right term period		30 months
Maximum amount payable for contingent value rights		$ 17,300,000
Recognized gain on contingent value right				$ 1,457,000
Post-transaction ownership percentage		100.00%
Fair value of existing interest		$ 6,437,000
Gain resulting from remeasurement of fair value of existing interest						$ 5,261,000
Amounts recorded:
Net working capital		573,000
Property, plant and equipment, net		1,257,000
Intangible assets, in progress research and development		18,400,000
Debt assumed		1,577,000
Goodwill		$ 1,390,000
Kleo
Business Acquisition [Line Items]
Ownership percentage									41.90%
Equity method investment									$ 1,176,000