Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		12 Months Ended	242 Months Ended
	Apr. 30, 2018	Jan. 31, 2014	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2018	Mar. 31, 2024	Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]
Fully amortized intangible assets			$ 137,894			$ 137,894	$ 137,894
Accumulated Amortization			18,543			18,543	16,525
Intangible asset amortization			2,018	$ 379
HETLIOZ®
Finite-Lived Intangible Assets [Line Items]
Acquisition of intangible assets		$ 8,000			$ 25,000	37,500
Cumulative worldwide sales milestone	$ 250,000
Fully amortized intangible assets			33,000			33,000	33,000
Accumulated Amortization			16,303			16,303	15,937
Fanapt®
Finite-Lived Intangible Assets [Line Items]
Fully amortized intangible assets			27,900			27,900	27,900
Accumulated Amortization			$ 27,900			$ 27,900	$ 27,900