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Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2023

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,
		2023				2022				2023				2022
Cost of goods sold		$	29			$	22			$	44			$	26
Research and development			280				278				517				554
Sales and marketing			115				296				276				583
General and administrative			544				618				1,112				1,292
Total stock-based compensation expense		$	968			$	1,214			$	1,949			$	2,455

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)			Aggregate Intrinsic Value (in thousands)
Balance at December 31, 2022			2,065			$	11.78				6.7		$	758
Granted			267			$	5.71
Exercised			(12	)		$	2.30						$	40
Expired/Forfeited			(191	)		$	13.08
Balance at June 30, 2023			2,129			$	10.95				6.4		$	608
Vested and exercisable at June 30, 2023			1,491			$	11.45				5.3		$	541
Vested and expected to vest at June 30, 2023			2,129			$	10.95				6.4		$	608

Summary of Outstanding Restricted Stock Unit Activity

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

		Restricted stock units				Weighted average grant date fair value
Balance at December 31, 2022			444			$	11.78
Grants			583			$	5.27
Vested and released			(284	)		$	8.06
Forfeited			(91	)		$	9.40
Balance at June 30, 2023			652			$	7.91

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, 2022			137			$	2.09
Grants			—			$	—
Vested and released			—			$	—
Forfeited			(23	)		$	2.20
Balance at June 30, 2023			114			$	2.07

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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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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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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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