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Stock-Based Compensation (Tables)

9 Months Ended

Sep. 30, 2024

Stock-Based Compensation

Schedule of assumptions used in the fair value estimation of each option grant

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​	​	​	​	​	​
​	​	September 30,			​
​		2024		2023
Expected life (years)	​	3.8 - 4.9	​	3.8 - 5.2	​
Risk-free interest rate		3.5% - 4.5%	​	3.5% - 4.4%	​
Volatility	​	68.9% - 74.9%	​	69.9% - 80.0%	​
Dividend yield		0%	​	0%	​

Schedule of stock-based compensation expense related to all of our share-based payment awards

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Three Months Ended September 30,

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Nine Months Ended September 30,

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2024

2023

2024

2023

Cost of revenue

​

$

668

​

$

604

​

$

2,030

​

$

1,655

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Selling, general and administrative

​

3,851

​

​

4,904

​

12,206

​

​

13,973

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Engineering and development

​

319

​

​

468

​

1,055

​

​

1,332

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​

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$

4,838

​

$

5,976

​

$

15,291

​

$

16,960

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Schedule of stock option activity

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​	​	​	​	​	​	​	​	​	​	​
​	​	​	​	​	​	​	Weighted-	​	​	​
​	​	​	​	Weighted-		​	Average	​	​	​
​	​	​	​	Average		​	Remaining	​	Aggregate
​	​	Number of	​	Exercise		​	Contractual	​	Intrinsic
​		Shares		Price/Share			Term (Years)		Value (1)
Outstanding — December 31, 2023	​	7,224,820	​	$	15.88	​	—	​	​	—
Granted (weighted-average fair value of $7.67 per share)	​	325,889	​	​	13.94	​	—	​	​	—
Exercised		(120,681)		​	5.37		—	​	​	—
Forfeited	​	(97,129)	​	​	33.56	​	—	​	​	—
Outstanding — September 30, 2024		7,332,899	​	$	15.73		3.7	​	$	9,098
Vested (exercisable) — September 30, 2024		6,632,991	​	$	14.87		3.5	​	$	9,098
Expected to vest after September 30, 2024 (unexercisable)		699,908	​	$	23.93		5.6	​	$	—

(1) Aggregate intrinsic value represents the difference between the exercise price of the option and the closing market price of our common stock on September 30, 2024, which was $8.11 per share.

Schedule of restricted stock unit activity

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​	​	​	​	​	​
​		​		Weighted Average
​	​	Number of Restricted	​	Fair Value per
​	​	Stock Units	​	Share
Outstanding – December 31, 2023		1,076,629	​	$	27.73
Granted		441,764	​		14.26
Share issuance		(338,876)	​		15.84
Forfeited		(107,400)	​		23.50
Outstanding – September 30, 2024		1,072,117	​	$	21.80

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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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