STOCK-BASED COMPENSATION AND BENEFIT PLAN - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares
Stock Options
Outstanding beginning balance (in shares) | shares	13,312,835
Granted (in shares) | shares	5,200,050
Exercised (in shares) | shares	(306,464)
Expired (in shares) | shares	(790,326)
Canceled and forfeited (in shares) | shares	(660,270)
Outstanding ending balance (in shares) | shares	16,755,825	13,312,835
Options exercisable at end of period (in shares) | shares	8,415,196
Weighted Average Exercise Price
Outstanding beginning balance (in dollars per share) | $ / shares	$ 4.20
Granted (in dollars per share) | $ / shares	1.56
Exercised (in dollars per share) | $ / shares	0.51
Expired (in dollars per share) | $ / shares	9.97
Canceled and forfeited (in dollars per share) | $ / shares	3.09
Outstanding ending balance (in dollars per share) | $ / shares	3.22	$ 4.20
Options exercisable at end of period, weighted-average exercise price (in dollars per share) | $ / shares	$ 4.97
Weighted-Average Contractual Life (years)
Options outstanding, weighted-average remaining contractual life (in years)	7 years 4 months 28 days	7 years 3 months 7 days
Options exercisable at end of period, weighted-average remaining contractual life (in years)	5 years 10 months 20 days
Options outstanding, aggregate intrinsic value | $	$ 2,878	$ 0