Summary of Significant Accounting Policies - Schedule of Net Product Sales (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Revenue from External Customer [Line Items]
Total net product sales	$ 50,529	$ 52,590	$ 102,247	$ 102,631
Fanapt® net product sales
Revenue from External Customer [Line Items]
Total net product sales	35,989	29,294	65,549	52,839
HETLIOZ® net product sales
Revenue from External Customer [Line Items]
Total net product sales	5,576	16,192	21,523	37,064
PONVORY® net product sales
Revenue from External Customer [Line Items]
Total net product sales	7,935	7,104	14,146	12,728
NEREUSTM net product sales
Revenue from External Customer [Line Items]
Total net product sales	$ 1,029	$ 0	$ 1,029	$ 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