Summary of Computation of Basic and Diluted Net Income (Loss) per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Earnings Per Share [Abstract]
Basic net income (loss) attributable to AVEO common stockholders	$ 555	$ (8,988)
Less: non-cash gains attributable to the change in fair value of the PIPE Warrant liability	(8,815)
Diluted net income (loss) attributable to AVEO common stockholders	$ (8,260)	$ (8,988)
Weighted-average shares of common stock outstanding	132,304	118,840
Dilutive securities:
Incremental common shares issuable upon the exercise of the PIPE Warrants	527
Weighted-average number of common shares outstanding and dilutive share equivalents outstanding	132,831	118,840
Basic net income (loss) per share	$ 0.01	$ (0.08)
Diluted net income (loss) per share	$ (0.06)	$ (0.08)