Segment Information - Schedule of Segment Reporting Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenues	$ 25,225	$ 29,329	$ 52,397	$ 54,260
Cost of revenues	770	1,077	1,749	2,202
Gross profit	24,455	28,252	50,648	52,058
Operating expenses excluding cost of revenues:
Selling and marketing	14,414	17,999	26,956	30,767
Research and development	3,355	3,568	5,537	6,203
General and administrative	3,424	1,711	6,822	3,450
Total operating expenses excluding cost of revenues	21,193	23,278	39,315	40,420
Income from operations	3,262	4,974	11,333	11,638
Supplemental disclosure of stock-based compensation expense:
Stock-based compensation	16		27
Total assets	120,929		120,929		$ 116,539
Purchase of property and equipment			1,687	4,219
General and administrative
Supplemental disclosure of stock-based compensation expense:
Stock-based compensation	16		27
Gyre Pharmaceuticals
Segment Reporting Information [Line Items]
Revenues	25,225	29,329	52,397	54,260
Cost of revenues	770	1,077	1,749	2,202
Gross profit	24,455	28,252	50,648	52,058
Operating expenses excluding cost of revenues:
Selling and marketing	14,414	17,999	26,956	30,767
Research and development	3,077	3,568	5,086	6,203
General and administrative	2,549	1,174	4,806	2,896
Total operating expenses excluding cost of revenues	20,040	22,741	36,848	39,866
Income from operations	4,415	5,511	13,800	12,192
Supplemental disclosure of stock-based compensation expense:
Total assets	109,484		109,484		101,761
Purchase of property and equipment			1,673	4,219
Gyre
Operating expenses excluding cost of revenues:
Research and development	278		451
General and administrative	874		2,015
Total operating expenses excluding cost of revenues	1,152		2,466
Income from operations	(1,152)		(2,466)
Supplemental disclosure of stock-based compensation expense:
Stock-based compensation	16		27
Total assets	10,533		10,533		13,865
Purchase of property and equipment			14
Gyre | General and administrative
Supplemental disclosure of stock-based compensation expense:
Stock-based compensation	16		27
Other
Operating expenses excluding cost of revenues:
General and administrative	1	537	1	554
Total operating expenses excluding cost of revenues	1	537	1	554
Income from operations	(1)	$ (537)	(1)	$ (554)
Supplemental disclosure of stock-based compensation expense:
Total assets	$ 912		$ 912		$ 913