Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Summary of Stock Option Activity (Detail)

v3.20.2
Stock-Based Compensation - Summary of Stock Option Activity (Detail)
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Options Exercisable, Beginning Balance | shares 1,789,567
Options Exercisable, Ending Balance | shares 2,216,755
Weighted-Average Exercise Price Per Share, Beginning Balance | $ / shares $ 8.73
Weighted-Average Exercise Price Per Share, Ending Balance | $ / shares $ 9.94
Options Outstanding, Beginning Balance | shares 4,481,359
Options Outstanding, Granted | shares 800,265
Options Outstanding, Exercised | shares (58,575)
Options Outstanding, Forfeited or expired | shares (568,907)
Options Outstanding, Ending Balance | shares 4,654,142
Weighted-Average Exercise Price Per Share, Beginning Balance | $ / shares $ 11.73
Weighted-Average Exercise Price Per Share, Granted | $ / shares 4.78
Weighted-Average Exercise Price Per Share, Exercised | $ / shares 3.60
Weighted-Average Exercise Price Per Share, Forfeited or expired | $ / shares 14.92
Weighted-Average Exercise Price Per Share, Ending Balance | $ / shares $ 10.34