Stock-Based Compensation Expense (Tables)

9 Months Ended

Sep. 30, 2022

Share-based Payment Arrangement [Abstract]

Summary of Share-Based Payment Arrangement, Option, Activity

The following table summarizes the stock option activity for the nine months ended September 30, 2022:

	Options outstanding
	Number of shares			Weighted average exercise price per share		Weighted average contractual term (in years)		Aggregate intrinsic value (in thousands)
Outstanding - December 31, 2021		197,637		$	138.20	5.13		$	15,398
Options granted		—			—
Options exercised		(14,741	)		5.05
Options cancelled		(5,308	)		199.37
Options expired		—			—
Outstanding at September 30, 2022		177,588		$	147.56		4.53	$	9.12
Vested and exercisable - September 30, 2022		166,418		$	140.29		4.36	$	9.12
Vested and expected to vest - September 30, 2022		177,588		$	147.56		4.53	$	9.12

Summary of Share-Based Payment Arrangement, Restricted Stock And Restricted Stock Unit, Activity

The following table summarizes the restricted stock unit activity for the nine months ended September 30, 2022:

	Restricted Stock Units (“RSUs”)
	Number of shares			Weighted average grant date fair value
Unvested as of December 31, 2021		565,005		$	137.94
Granted		415,210			22.11
Vested		(437,106	)		126.41
Forfeited or cancelled		(44,054	)		75.75
Unvested as of September 30, 2022		499,055		$	56.85

Summary of Share-Based Payment Arrangement, Expensed And Capitalized, Amount

The following table summarizes stock-based compensation expense and its allocation within the accompanying condensed consolidated statements of operations for the three and nine months ended September 30, 2022 and 2021, respectively (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2022		2021		2022		2021
Cost of goods sold	$	179	$	16	$	1,016	$	57
Research and development		1,321		415		10,462		1,311
Sales and marketing		1,012		211		6,854		653
General and administrative		2,196		2,706		43,188		8,633
Total stock-based compensation expense	$	4,708	$	3,348	$	61,520	$	10,654