Acquisitions (Details) - USD ($)			3 Months Ended		9 Months Ended	12 Months Ended
	Apr. 04, 2022	Jan. 04, 2021	Jun. 30, 2022	Mar. 31, 2021	Sep. 30, 2022	Dec. 31, 2021	Dec. 31, 2020
Amounts recorded:
Goodwill					$ 1,390,000	$ 1,390,000
Channel
Amounts recorded:
R&D expense					$ 25,000,000
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
Charge to research and development expense			$ 93,747,000
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