STOCK-BASED COMPENSATION AND BENEFIT PLAN - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 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	5,037,450
Exercised (in shares) | shares	(304,152)
Expired (in shares) | shares	(119,043)
Canceled and forfeited (in shares) | shares	(648,270)
Outstanding ending balance (in shares) | shares	17,278,820	13,312,835
Options exercisable at end of period (in shares) | shares	8,559,257
Weighted Average Exercise Price
Outstanding beginning balance (in dollars per share) | $ / shares	$ 4.20
Granted (in dollars per share) | $ / shares	1.57
Exercised (in dollars per share) | $ / shares	0.51
Expired (in dollars per share) | $ / shares	21.02
Canceled and forfeited (in dollars per share) | $ / shares	3.11
Outstanding ending balance (in dollars per share) | $ / shares	3.42	$ 4.20
Options exercisable at end of period, weighted-average exercise price (in dollars per share) | $ / shares	$ 5.40
Weighted-Average Contractual Life (years)
Options outstanding, weighted-average remaining contractual life (in years)	7 years 4 months 13 days	7 years 3 months 7 days
Options exercisable at end of period, weighted-average remaining contractual life (in years)	5 years 7 months 2 days
Options outstanding, aggregate intrinsic value | $	$ 1,521	$ 0