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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

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, 2022 and 2021, are provided in the following table:

		For the Years Ended December 31,
		2022				2021
Expected dividend yield			0	%			0	%
Expected volatility			57.4	%			52.4	%
Expected term (years)			5.6				5.6
Risk-free interest rate			4.6	%			0.7	%

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, 2021			2,000			$	12.79				7.3		$	2,246
Granted			451			$	8.58
Exercised			(9	)		$	2.30						$	59
Expired/Forfeited			(377	)		$	13.56
Balance at December 31, 2022			2,065			$	11.78				6.7		$	758
Vested and exercisable at December 31, 2022			1,370			$	11.42				5.6		$	758
Vested and expected to vest at December 31, 2022			2,065			$	11.78				6.7		$	758

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, 2021			333			$	17.55
Grants			294			$	8.14
Vested and released			(89	)		$	17.43
Forfeited			(94	)		$	15.50
Balance at December 31, 2022			444			$	11.78

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,
		2022				2021
Cost of goods sold		$	181			$	3
Research and development			1,056				777
Sales and marketing			1,195				919
General and administrative			2,546				2,350
Total stock-based compensation expense		$	4,978			$	4,049

Schedule of performance stock unit

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

		Performance stock units				Weighted average grant date fair value
Balance at December 31, 2021			—			$	—
Grants			137			$	2.09
Vested and released			—			$	—
Forfeited			—			$	—
Balance at December 31, 2022			137			$	2.09

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Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement.

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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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