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Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2022

Share-Based Payment Arrangement [Abstract]

Schedule Of Stock Based Compensation Expenses

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

		Three months ended September 30,								Nine months ended September 30,
		2022				2021				2022				2021
Cost of goods sold		$	36			$	1			$	71			$	3
Research and development			255				211				800				591
Sales and marketing			273				230				856				658
General and administrative			556				626				1,848				1,752
Total stock-based compensation expense		$	1,120			$	1,068			$	3,575			$	3,004

Summary of Outstanding Stock Option Activity

The following table summarizes the outstanding stock option activity during the period indicated (shares in thousands):

						Weighted average
		Number of stock options				Exercise price				Remaining contractual term (in years)
Balance at December 31, 2021			2,000			$	12.79				7.3
Granted			314			$	9.23
Exercised			(9	)		$	2.30
Expired/Forfeited			(327	)		$	13.38
Balance at September 30, 2022			1,978			$	12.18				6.7
Vested and exercisable at September 30, 2022			1,334			$	11.33				5.8
Vested and expected to vest at September 30, 2022			1,978			$	12.18				6.7

Summary of Outstanding Restricted Stock Unit Activity

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

		Restricted stock units				Weighted average grant date fair value
Balance at December 31, 2021			333			$	17.55
Grants			147			$	9.02
Vested and released			(85	)		$	17.71
Forfeited			(86	)		$	15.51
Balance at September 30, 2022			309			$	14.01

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			174			$	2.20
Vested and released			—			$	—
Forfeited			—			$	—
Balance at September 30, 2022			174			$	2.20

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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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