Stockholder's Equity (Tables)

6 Months Ended

Jun. 30, 2021

Equity [Abstract]

Share Grants Activity

The following table represents the share grants activity for the six months ended June 30, 2021: 

	Restricted stock			Options
	Number of shares	Weighted average grant date fair value		Number of shares	Weighted average grant date fair value
Share grants outstanding as of December 31, 2020	469,631	$	89.69	74,235	$	42.07
Granted	118,735	185.05		—	—
Vested or exercised	(163,978)	186.82		—	—
Share grants outstanding as of June 30, 2021	424,388	$	120.11	74,235	$	42.07

Shares of Common Stock Issued Under Employee Stock Purchase Plan

The table below details the shares of common stock issued during 2021: 

	Number of shares	Per share price
Shares available as of December 31, 2020	118,136
Shares issued during the three months ended March 31, 2021	3,204	$	202.66
Shares issued during the three months ended June 30, 2021	3,152	$	181.65
Shares available as of June 30, 2021	111,780