Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Stock-Based Compensation - Summary of Stock Option Activity (Detail)
6 Months Ended
Jun. 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 1,585,276
Weighted-Average Exercise Price Per Share, Beginning Balance | $ / shares $ 7.45
Weighted-Average Exercise Price Per Share, Ending Balance | $ / shares $ 8.34
Options Outstanding, Beginning Balance | shares 3,201,887
Options Outstanding, Granted | shares 1,490,000
Options Outstanding, Exercised | shares (85,452)
Options Outstanding, Forfeited or expired | shares (12,085)
Options Outstanding, Other activity | shares 12,495
Options Outstanding, Ending Balance | shares 4,606,845
Weighted-Average Exercise Price Per Share, Beginning Balance | $ / shares $ 10.67
Weighted-Average Exercise Price Per Share, Granted | $ / shares 14.75
Weighted-Average Exercise Price Per Share, Exercised | $ / shares 3.61
Weighted-Average Exercise Price Per Share, Forfeited or expired | $ / shares 17.72
Weighted-Average Exercise Price Share, Other activity | $ / shares 13.29
Weighted-Average Exercise Price Per Share, Ending Balance | $ / shares $ 12.11