Net Loss Per Share - Schedule of Net Loss and Weighted Average Number of Shares Used in Computing Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator:
Net loss	$ (6,230)	$ (11,620)
Denominator:
Weighted average number of shares of common stock used in computing net loss per share, basic	2,166,356	2,166,275
Weighted average number of shares of common stock used in computing net loss per share, diluted	2,166,356	2,166,275
Net loss per share, basic	$ (2.88)	$ (5.36)
Net loss per share, diluted	$ (2.88)	$ (5.36)