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Stock Based Compensation (Tables)

6 Months Ended

Jun. 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 June 30,								Six months ended June 30,
		2022				2021				2022				2021
Cost of goods sold		$	22			$	1			$	26			$	2
Research and development			278				176				554				380
Sales and marketing			296				213				583				428
General and administrative			618				618				1,292				1,126
Total stock-based compensation expense		$	1,214			$	1,008			$	2,455			$	1,936

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			308				9.24
Exercised			(8	)			2.33
Expired/Forfeited			(241	)			13.47
Balance at June 30, 2022			2,059				12.22				7.0
Vested and exercisable at June 30, 2022			1,288				11.12				6.0
Vested and expected to vest at June 30, 2022			2,059				12.22				7.0

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			145			$	9.02
Vested and released			(78	)		$	17.90
Forfeited			(69	)		$	15.54
Balance at June 30, 2022			331			$	14.13

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 June 30, 2022			174			$	—

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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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