STOCK BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2023

STOCK BASED COMPENSATION

Schedule of option activity

The option activity of the Plans for the nine months ended September 30, 2023, is as follows (shares in thousands):

				Weighted-Average
		Weighted-Average		Remaining	Aggregate
	Number of	Exercise Price		Contractual Term	Intrinsic Value
	Shares	per Share		(in years)	(in thousands)
Outstanding at January 1, 2023	8,423	$	1.83	6.02	$	922
Exercised	(1,006)	$	1.20
Forfeited/expired	(1,126)	$	2.41
Outstanding at September 30, 2023	6,291	$	1.83	5.24		989
Options vested at September 30, 2023	5,693	$	1.86	5.08		954
Options vested or expected to vest at September 30, 2023	6,287	$	1.83	5.24		989

Schedule of RSU activity under the Plan

The activity for stock subject to vesting as of September 30, 2023, is as follows (shares in thousands):

	Shares Subject	Weighted-Average
	to Vesting	Grant Date Fair Value
Balance of unvested shares as of January 1, 2023	102	$ 8.78
Vested	(85)	$ 8.78
Balance of unvested shares as of September 30, 2023	17	$ 8.78

Schedule of RSU activity

RSU activity under the 2020 Plan for the nine months ended September 30, 2023, is as follows (shares in thousands):

	Shares Subject	Weighted-Average
	to Vesting	Grant Date Fair Value
Balance of unvested shares as of January 1, 2023	22,145	$ 4.15
Granted	9,677	$ 1.86
Vested	(4,062)	$ 5.28
Cancelled/Forfeited	(2,278)	$ 4.57
Balance of unvested shares as of September 30, 2023	25,482	$ 3.07

Schedule of stock-based compensation expense

Total stock-based compensation expense related to all of the Company’s stock-based awards granted is reported in the condensed consolidated statements of operations as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Research and development	$	3,662	$	4,355	$	12,612	$	21,872
General and administrative expense		2,802		3,899		10,419		11,681
Sales and marketing expense		702		3,052		1,881		5,725
Cost of sales		517		734		1,787		1,892
Total stock-based compensation expense	$	7,683	$	12,040	$	26,699	$	41,170