Nature of the Business and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Nature Of Business And Basis Of Presentation [Abstract]
Net loss	$ 19,400	$ 23,300
Accumulated deficit	$ 297,130		$ 277,707