Summary of Significant Accounting Policies - Net Sales by Product (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue from External Customer [Line Items]
Net product sales	$ 254,382	$ 268,682	$ 248,168
HETLIOZ®
Revenue from External Customer [Line Items]
Net product sales	159,655	173,536	160,686
Fanapt®
Revenue from External Customer [Line Items]
Net product sales	$ 94,727	$ 95,146	$ 87,482

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