STOCK BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2024

STOCK BASED COMPENSATION

Schedule of option activity

The option activity of the Plans for the six months ended June 30, 2024, 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, 2024	616	$	18.30	4.97	$	140
Forfeited/expired	(53)	$	16.43
Outstanding at June 30, 2024	563	$	18.52	4.44		59
Options vested at June 30, 2024	558	$	18.56	4.43		59
Options vested or expected to vest at June 30, 2024	563	$	18.52	4.44		59

Schedule of RSU activity

RSU activity under the 2020 Plan for the six months ended June 30, 2024, is as follows (shares in thousands):

	Shares Subject	Weighted-Average
	to Vesting	Grant Date Fair Value
Balance of unvested shares as of January 1, 2024	2,305	$ 28.40
Granted	1,472	$ 6.77
Vested	(727)	$ 21.48
Cancelled/Forfeited	(205)	$ 33.72
Balance of unvested shares as of June 30, 2024	2,845

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 June 30,				Six Months Ended June 30,
	2024		2023		2024		2023
Research and development	$	2,384	$	4,673	$	5,887	$	8,950
General and administrative expense		3,107		3,649		6,285		7,617
Sales and marketing expense		531		791		1,120		1,179
Cost of sales		475		590		1,043		1,270
Total stock-based compensation expense	$	6,497	$	9,703	$	14,335	$	19,016