Business Segment, Geographic, and Concentration Risk Information - Summary of Depreciation, Amortization and Assets by Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Total depreciation and amortization
Total consolidated depreciation and amortization	$ 4,468	$ 5,003
Total assets:
Total assets	204,055	267,448
Operating Segments
Total depreciation and amortization
Total consolidated depreciation and amortization	2,322	3,138
Total assets:
Total assets	196,747	194,920
Operating Segments | Oncology Innovation Platform
Total depreciation and amortization
Total consolidated depreciation and amortization	1,064	1,317
Total assets:
Total assets	120,206	141,808
Operating Segments | Commercial Platform
Total depreciation and amortization
Total consolidated depreciation and amortization	1,258	1,821
Total assets:
Total assets	76,541	53,112
Discontinued operations
Total depreciation and amortization
Total consolidated depreciation and amortization	2,146	1,865
Total assets:
Total assets	$ 7,308	$ 72,528