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Stockholders' Equity - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions	1 Months Ended	9 Months Ended
	Aug. 31, 2020	Sep. 30, 2020
Class Of Stock [Line Items]
Common stock issues in connection with merger agreement		$ 44,280
Cersci Therapeutics
Class Of Stock [Line Items]
Stock issued in connection with acquisition, shares	1.2
Common stock issues in connection with merger agreement	$ 44,300

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