Common Stock and Stock-Based Awards - Common Stock - Additional Information (Detail) - At The Market Equity Offering Program [Member] - Cowen And Company, LLC [Member] $ / shares in Units, $ in Thousands		3 Months Ended
	Nov. 27, 2019 USD ($)	Mar. 31, 2020 USD ($) $ / shares shares
2019 Sales Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Gross proceeds from sale of common stock	$ 25,000
2019 and 2020 Sales Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares issued | shares		1,230,531
Common stock, average price per share | $ / shares		$ 3.50
Net proceeds from sale of common stock		$ 4,178
Percentage of commission on sale of common stock		3