Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Stock Option Plan and Restricted Stock Activity (Details)

v3.20.2
Stockholders' Equity - Stock Option Plan and Restricted Stock Activity (Details)
9 Months Ended
Sep. 30, 2020
$ / shares
shares
Stock Options  
Shares  
Balance at beginning of period (shares) | shares 1,956,379
Granted (shares) | shares 480,250
Options exercised (shares) | shares (113,107)
Forfeited (shares) | shares (10,200)
Balance at end of period (shares) | shares 2,313,322
Weighted-Average Exercise Price  
Balance at beginning of period (USD per share) | $ / shares $ 77.54
Granted (USD per share) | $ / shares 90.08
Options exercised (USD per share) | $ / shares 23.91
Forfeited (USD per share) | $ / shares 72.01
Balance at end of period (USD per share) | $ / shares $ 82.79
Restricted Stock Awards  
Restricted Stock Awards  
Nonvested at beginning of period (shares) | shares 147,259
Granted (shares) | shares 104,306
RSUs vested (shares) | shares (50,053)
Forfeited (shares) | shares 0
Nonvested at end of period (shares) | shares 201,512
Weighted-Average Grant Date Fair Value  
Nonvested at beginning of period (USD per share) | $ / shares $ 125.11
Granted (USD per share) | $ / shares 89.58
RSUs vested (USD per share) | $ / shares 122.16
Forfeited (USD per share) | $ / shares 0
Nonvested at end of period (USD per share) | $ / shares $ 107.45