Financial Statement Details - Summary of Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Royalties	$ 1,415	$ 1,727
Payroll and related expenses	2,716	2,415
Professional fees	483	514
Accrued interest	1,543	239
Deferred revenue	2,235	2,048
Operating lease liabilities	1,101
Acquisition-related liabilities	1,000	1,000
Other	7,368	5,081
Accrued expenses and other current liabilities, total	$ 17,861	$ 13,024