Revenues, Significant Customers and Concentrations of Risk - Summary of Revenue Disaggregated by Types of Goods and Services and Major Product (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation Of Revenue [Line Items]
Total revenue	$ 33,079	$ 23,286
Total Product Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	27,097	18,300
Total Product Revenue [Member] | Proprietary Product [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	12,566	4,771
Total Product Revenue [Member] | Partnered Product [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	14,531	13,529
Licensing and Development Revenue [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	1,755	915
Royalties [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 4,227	$ 4,071