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Nature of the Business and Basis of Presentation - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Subsidiary, Sale of Stock [Line Items]
Net losses	$ 3,801	$ 1,442	$ 11,200
Accumulated deficit	122,012		$ 118,211
Revolving Credit Facility [Member]
Subsidiary, Sale of Stock [Line Items]
Credit facility borrowing capacity	$ 25,000

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