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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Weighted Average Assumptions Used in Estimating Fair Value of Stock Options

The grant-date fair value of each option award is estimated on the date of grant using the Black-Scholes-Merton option-pricing model. The weighted average assumptions for grants during the years ended December 31, 2023 and 2022 are provided in the following table:

		For the Years Ended December 31,
		2023				2022
Expected dividend yield			0	%			0	%
Expected volatility			61.0	%			57.4	%
Expected term (years)			4.3				5.6
Risk-free interest rate			4.0	%			4.6	%

Summary of Outstanding Stock Option Activity

A summary of the Company’s stock option activity is as follows (shares in thousands):

						Weighted Average
		Number of stock options				Exercise price				Remaining contractual term (years)			Aggregate Intrinsic Value (in thousands)
Balance at December 31, 2022			2,065			$	11.78				6.7		$	758
Granted			396			$	4.90
Exercised			(12	)		$	2.30						$	40
Expired/Forfeited			(345	)		$	13.82
Balance at December 31, 2023			2,104			$	10.20				6.2		$	329
Vested and exercisable at December 31, 2023			1,482			$	11.25				5.1		$	264
Vested and expected to vest at December 31, 2023			2,104			$	10.20				6.2		$	329

Summary of Outstanding Restricted Stock Unit Activity

The following table summarizes the Company’s restricted stock unit activity (shares in thousands):

		Restricted stock units				Weighted average grant date fair value
Balance at December 31, 2022			444			$	11.78
Grants			726			$	4.94
Vested and released			(312	)		$	8.13
Forfeited			(152	)		$	8.90
Balance at December 31, 2023			706			$	6.97

Schedule Of Stock Based Compensation Expenses

Stock-based compensation is recorded in the consolidated statements of operations as follows (in thousands):

		For the Years Ended December 31,
		2023				2022
Cost of goods sold		$	107			$	181
Research and development			1,062				1,056
Sales and marketing			373				1,195
General and administrative			2,139				2,546
Total stock-based compensation expense		$	3,681			$	4,978

Schedule of performance stock unit

The following table summarizes the Company's PSU activity during the period indicated (shares in thousands):

		Performance stock units				Weighted average grant date fair value
Balance at December 31, 2022			137			$	2.09
Grants			18			$	0.60
Vested and released			—			$	—
Forfeited			(45	)		$	2.20
Balance at December 31, 2023			110			$	1.79

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