Summary of Significant Accounting Policies - Schedule of Net Product Sales (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Revenue from External Customer [Line Items]
Total net product sales	$ 69,815	$ 56,258	$ 172,062	$ 158,889
Fanapt® net product sales
Revenue from External Customer [Line Items]
Total net product sales	38,765	31,245	104,314	84,084
HETLIOZ® net product sales
Revenue from External Customer [Line Items]
Total net product sales	21,689	17,978	43,212	55,042
PONVORY® net product sales
Revenue from External Customer [Line Items]
Total net product sales	7,749	7,035	21,895	19,763
NEREUSTM net product sales
Revenue from External Customer [Line Items]
Total net product sales	$ 1,612	$ 0	$ 2,641	$ 0

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details