Common Stock Equivalents Excluded From Diluted Net Loss Per Share (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	7,446	7,181
Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	633	1,043
PSUs
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	180
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	545	562
Warrants
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	275	40
Shares of Common Stock Issuable Upon Conversion of Series B Convertible Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Common stock equivalents diluted net income (loss) per share inclusion anti-dilutive	5,813	5,536