STOCK-BASED COMPENSATION - Summary of Company's Stock Option Activity (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2022 $ / shares shares	Dec. 31, 2021 $ / shares shares
Options
Outstanding at beginning of period (in shares) | shares	9,163,160
Granted (in shares) | shares	0
Exercised (in shares) | shares	(515,705)
Forfeited (in shares) | shares	(133,951)
Expired (in shares) | shares	(49,766)
Outstanding at end of period (in shares) | shares	8,463,738	9,163,160
Weighted Average Exercise Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 5.13
Granted (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	0.55
Forfeited (in dollars per share) | $ / shares	13.24
Expired (in dollars per share) | $ / shares	13.99
Outstanding at end of period (in dollars per share) | $ / shares	$ 5.23	$ 5.13
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options, exercisable (in shares) | shares	6,203,101
Options, vested and expected to vest (in shares) | shares	8,463,738
Weighted average exercise price, exercisable (in dollars per share) | $ / shares	$ 3.20
Weighted average exercise price, vested and expected to vest (in dollars per share) | $ / shares	$ 5.23
Weighted average remaining contractual term (years), outstanding	6 years 3 months 14 days	6 years 4 months 24 days
Weighted average remaining contractual term (years), exercisable	5 years 6 months 10 days
Weighted average remaining contractual term (years), vested and expected to vest	6 years 3 months 14 days