STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2024

STOCK-BASED COMPENSATION

Schedule of stock-based compensation expenses

	Three Months Ended
	March 31,
(in thousands)	2024		2023
Research and development	$	992	$	862
General and administrative		1,387		1,193
Total stock-based compensation expense	$	2,379	$	2,055

Schedule of options outstanding

				Weighted-Average
		Weighted-		Remaining	Aggregate
	Options	Average		Contractual	Intrinsic
(in thousands, except for share data)	Outstanding	Exercise Price		Term (in years)	Value
Outstanding at December 31, 2023	4,695,619	$	2.01	5.9	$	7,875
Options granted	—		—
Options exercised	(32,290)		1.05
Forfeited	—		—
Expired	—		—
Outstanding at March 31, 2024	4,663,329	$	2.01	5.1	$	22,318
Exercisable at March 31, 2024	4,371,160	$	2.08	5.1	$	20,638
Nonvested at March 31, 2024	292,169	$	1.05	7.5	$	1,680

Schedule of restricted stock units outstanding

		Weighted-Average
		Grant Date
(in thousands, except for share data)	Shares	Fair Value
Outstanding at December 31, 2023	6,917,422	$	2.35
Awarded	530,000		6.75
Released	(822,682)		1.25
Forfeited	—		—
Outstanding at March 31, 2024	6,624,740	$	3.05
Nonvested at March 31, 2024	6,533,180	$	3.01
Weighted Average Remaining Recognition Period (in years)	3.0