Property and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Depreciation Expense	$ 1.6	$ 1.7
Furniture and Fixtures, Manufacturing Equipment and Laboratory Equipment
Property Plant And Equipment [Line Items]
Amount of divestiture of long-lived		$ 2.1
Manufacturing Equipment and Computer Hardware
Property Plant And Equipment [Line Items]
Amount of divestiture of long-lived	$ 6.7