Stock Based Compensation and Other Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2023

Share-based compensation

Schedule of stock option activity

			Weighted		Weighted
			Average		Average		Aggregate
			Exercise		Contractual		Intrinsic
	Number of		Price		Remaining Term		Value
	shares		Per Share		(in years)		(in thousands)
Outstanding at January 1, 2023		2,025,542	$	20.24		6.10	$	10,804
Granted		804,302		23.44
Exercised		(28,473)		8.27
Forfeited, expired or cancelled		(71,303)		36.51
Outstanding at December 31, 2023		2,730,068	$	20.88		6.29	$	10,638
Exercisable at December 31, 2023		1,961,143	$	19.73		5.27	$	10,606

Schedule of grant date fair values of PSUs granted

						Derived
Hurdle Price		Number of		Fair Value		Service Period
Per Share		PSUs		Per Share		(in years)
$	30.00		243,550	$	11.42-17.45		0.69-2.59
$	35.00		91,239	$	10.16-16.07		0.93-2.59
$	40.00		60,024	$	9.07-14.84		1.12-2.59
$	45.00		53,787	$	8.12-13.72		1.27-2.59
			448,600

Schedule of performance shares, outstanding activity

			Weighted
			Average
			Grant Date
	Number of		Fair Value
	Unvested PSUs		Per Share
Unvested balance at January 1, 2023		—	$	—
Granted		448,600		15.40
Vested		—		—
Forfeited		—		—
Unvested balance at December 31, 2023		448,600	$	15.40

Summary of stock-based compensation expense

All stock-based compensation expense is recorded in G&A expense. The following table shows total stock-based compensation expense for stock options and ESPP in the consolidated statements of operations and comprehensive loss (in thousands):

	Year Ended December 31,
	2023		2022
Total stock-based compensation expense included in G&A	$	9,099	$	3,608

2010 Plan

Share-based compensation

Schedule of valuation assumptions

	Year Ended December 31,
	2023		2022
Dividend yield	0	%	0	%
Expected volatility	70	%	69	%
Risk-free interest rate	3.71	%	2.68	%
Expected term	5.79 years		5.64 years

Stock Option Inducement Award, Exercise price of $18.66 per share

Share-based compensation

Schedule of valuation assumptions

	Year Ended December 31,
	2023		2022(1)
Dividend yield	0	%	—
Expected volatility	69	%	—
Risk-free interest rate	3.92	%	—
Expected term	5.79 years		—

(1)No Stock Option Inducement Awards were granted during the year ended December 31, 2022.

Stock Option Inducement Award, Exercise price of $30.00 per share

Share-based compensation

Schedule of valuation assumptions

	Year Ended December 31,
	2023		2022(1)
Dividend yield	0	%	—
Expected volatility	91	%	—
Risk-free interest rate	3.86	%	—
Expected term	8.01 years		—

(1) No Stock Option Inducement Awards were granted during the year ended December 31, 2022.