Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2023

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Summary of Stock Options Activity

The following is a summary of stock option activity during the three months ended March 31, 2023:

	Options Outstanding
	Number of Options			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (years)		Aggregate Intrinsic Value
Balance—January 1, 2023		368,596		$	9.26		5.89	$	—
Options granted		—		$	—	—		$	—
Options exercised		—		$	—	—		$	—
Options canceled		(6,263	)	$	7.66	—		$	—
Balance—March 31, 2023		362,333		$	9.29		5.75	$	—
Exercisable as of March 31, 2023		362,333		$	9.29		5.75	$	—
Vested and expected to vest as of March 31, 2023		362,333		$	9.29		5.75	$	—

Summary of Restricted Stock Award Activity

A summary of restricted stock award activity within the Company’s equity plans and changes for the three months ended March 31, 2023 is as follows:

Restricted Stock Awards	Shares			Weighted Average Grant- Date Fair Value
Nonvested at January 1, 2023		4,223,023		$	4.85
Granted		668,104		$	0.93
Vested		(277,479	)	$	7.38
Forfeited		(586,233	)	$	3.46
Nonvested at March 31, 2023		4,027,415		$	4.21

Summary of Total Stock-based Compensation Expense by Function

The following table summarizes the total stock-based compensation expense by function, including expense related to consultants, for the three months ended March 31, 2022 and 2023 (in thousands):

	Three Months Ended March 31,
	2022		2023
	(in thousands)
Sales and distribution expenses	$	347	$	671
Research and development expenses		274		434
General and administrative expenses		2,244		1,212
Total stock-based compensation expense	$	2,865	$	2,317