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Stock Based Compensation (Tables)

9 Months Ended

Sep. 30, 2021

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,
		2021				2020				2021				2020
Cost of goods sold		$	1			$	—			$	3			$	—
Research and development			211				124				591				425
Sales and marketing			230				101				658				291
General and administrative			626				409				1,752				1,240
Total stock-based compensation expense		$	1,068			$	634			$	3,004			$	1,956

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, 2020			1,760			$	10.07				7.6
Granted			516				22.43
Exercised			(226	)			11.11
Expired/Forfeited			(97	)			14.26
Balance at September 30, 2021			1,953				13.00				7.5
Vested and exercisable at September 30, 2021			1,079				9.47				6.5
Vested and expected to vest at September 30, 2021			1,953				13.00				7.5

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, 2020			202			$	10.51
Grants			223				22.28
Vested and released			(61	)			10.43
Forfeited			(61	)			14.15
Balance at September 30, 2021			303				18.44

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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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