Stock Incentive Plans (Tables)

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement [Abstract]

Summary of Stock Options Activity Under the Plans

A summary of the Company's stock option activity under the Plans is as follows:

	Number of Options	Weighted-Average Exercise Price per Share		Weighted-Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value(1)
Balance as of December 31, 2023	36,671	$	16.09	7.45	$	24,481
Granted	—	0.00
Exercised	(130)	0.83
Canceled and forfeited (3)	(20,308)	21.39
Balance as of June 30, 2024	16,232	$	9.57	7.19	$	12,678
Exercisable as of June 30, 2024 (2)	11,869	$	10.55	6.72	$	13,839
Vested as of June 30, 2024	10,549	$	10.01	6.67	$	11,681

(1) Intrinsic value is calculated based on the difference between the exercise price of in-the-money stock options and the fair value of the common stock as of the respective balance sheet dates.

(2) The 2011 Plan allows for early exercise of stock options. Accordingly, options granted under this plan are included as exercisable stock options regardless of vesting status.

(3) The forfeiture of the Executive Chairman Long-Term Performance Award resulted in 19,788 options forfeited.

Schedule of Share-based Compensation Expense Recognized in the Period

The following table presents the share-based compensation expense by award type recognized within the following line items in the Condensed Consolidated Statement of Operations and Comprehensive Loss and Condensed Consolidated Balance Sheet in the periods presented:

	Three Months Ended June 30,				Six Months Ended June 30,
	2024		2023		2024	2023
Restricted stock units	$	28,656	$	25,179	52,819	49,970
Stock options	5,974		5,309		12,585	12,793
Performance restricted stock units	1,368		—		1,608	—
Employee Stock Purchase Plan	293		410		592	1,013
Share-based compensation recorded within Compensation and benefits	36,291		30,898		67,604	63,776
Executive chairman long-term performance award	(157,738)		13,267		(144,617)	26,388
Property and equipment (capitalized internal-use software)	1,918		1,254		3,998	2,282
Total share-based compensation (benefit) expense	$	(119,529)	$	45,419	(73,015)	$	92,446

Schedule ​of Unrecognized Compensation Costs by Award

Unrecognized compensation costs by award type as of June 30, 2024:

	Unrecognized compensation costs		Weighted-average recognition period (in years)
Restricted stock units, inclusive of PSUs	$	248,071	2.2
Stock options	28,801		1.7
Total	$	276,872