STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

Summary of Stock-Based Compensation Expense

Total stock-based compensation expense recognized in the Company’s condensed consolidated statements of operations and comprehensive loss is classified as follows (in thousands):

	Three Months Ended March 31,
	2023		2022
Cost of revenue	$	162	$	176
Research and development	450		724
Selling and marketing	466		693
General and administrative	2,259		3,439
Total stock-based compensation expense	$	3,337	$	5,032

Summary of Incentive Stock Units

The table below summarizes the Company’s activity and related information for its ISUs:

	RSUs and DSUs			PSUs
	Number of Shares	Weighted Average Grant Date Fair Value		Number of Shares	Weighted Average Grant Date Fair Value
Unvested at December 31, 2022	5,020,029	$	4.16	3,550,855	$	4.33
Granted	2,200,988	$	4.39	1,372,107	$	4.34
Performance based adjustment (1)	—	$	—	(1,150,777)	$	4.49
Vested	(1,994,691)	$	3.91	—	$	—
Cancelled or forfeited	(96,515)	$	3.31	(53,029)	$	4.34
Unvested at March 31, 2023	5,129,811	$	4.43	3,719,156	$	4.21
Vested and unreleased	274,943			—
Outstanding at March 31, 2023	5,404,754			3,719,156

(1) Represents an adjustment to the PSU accrual as of March 31, 2023 based on the expected level of achievement of previously granted awards.

Summary of Company's Stock Option Activity and Related Information

A summary of the Company’s stock option activity and related information is as follows:

	Number of Stock Options Outstanding	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life (Years)	Aggregate Intrinsic Value
					(In thousands)
Options outstanding at December 31, 2022	6,748,580	$	6.97	5.0	$	3,307
Options granted	—	—
Options exercised	(224,741)	$	1.28
Options cancelled or forfeited	(250,732)	$	7.20
Options outstanding at March 31, 2023	6,273,107	$	7.16	4.6	$	1,530
Options exercisable at March 31, 2023	6,100,929	$	7.30	4.7	$	1,267
Options vested and expected to vest at March 31, 2023	6,260,370	$	7.17	4.6	$	1,510