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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

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, 2021 and 2020, are provided in the following table:

		December 31,				December 31,
		2021				2020
Expected dividend yield			0	%			0	%
Expected volatility			52.4	%			44.1	%
Expected term (years)			5.6				5.8
Risk-free interest rate			0.7	%			1.5	%

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 (in years)
Balance at December 31, 2020			1,760			$	10.07				7.6
Granted			601				20.67
Exercised			(226	)			11.11
Expired/Forfeited			(135	)			15.09
Balance at December 31, 2021			2,000				12.79				7.3
Vested and exercisable at December 31, 2021			1,139				9.56				6.3
Vested and expected to vest at December 31, 2021			2,000				12.79				7.3

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, 2020			202			$	10.51
Grants			258				20.64
Vested and released			(62	)			10.50
Forfeited			(65	)			14.63
Balance at December 31, 2021			333				17.55

Schedule Of Stock Based Compensation Expenses

The stock-based compensation is reflected in the statements of operations as follows (in thousands):

		For the Years Ended December 31,
		2021				2020
Cost of goods sold		$	3			$	2
Research and development			777				548
Sales and marketing			919				390
General and administrative			2,350				1,624
Total stock-based compensation expense		$	4,049			$	2,564

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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 of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year.

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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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