Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.3
Stock-Based Compensation - Summary of Stock Option Activity (Detail)
9 Months Ended
Sep. 30, 2019
$ / shares
shares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Options Exercisable, Beginning Balance | shares 1,278,038
Options Exercisable, Ending Balance | shares 1,638,228
Weighted-Average Exercise Price Per Share, Beginning Balance | $ / shares $ 7.45
Weighted-Average Exercise Price Per Share, Ending Balance | $ / shares $ 8.20
Options Outstanding, Beginning Balance | shares 3,201,887
Options Outstanding, Granted | shares 1,490,000
Options Outstanding, Exercised | shares (86,952)
Options Outstanding, Forfeited or expired | shares (163,809)
Options Outstanding, Other activity | shares 12,495
Options Outstanding, Ending Balance | shares 4,453,621
Weighted-Average Exercise Price Per Share, Beginning Balance | $ / shares $ 10.67
Weighted-Average Exercise Price Per Share, Granted | $ / shares 14.45
Weighted-Average Exercise Price Per Share, Exercised | $ / shares 3.61
Weighted-Average Exercise Price Per Share, Forfeited or expired | $ / shares 13.79
Weighted-Average Exercise Price Share, Other activity | $ / shares 13.29
Weighted-Average Exercise Price Per Share, Ending Balance | $ / shares $ 11.95