SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Net Loss per Share (Details) - shares	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Antidilutive securities excluded from calculation of net loss per share	32,730,876	33,006,421
Employee Stock Option
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Antidilutive securities excluded from calculation of net loss per share	17,566,321	18,994,381
Restricted stock units
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Antidilutive securities excluded from calculation of net loss per share	12,711,528	11,411,549
Employee Stock Purchase Plan
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Antidilutive securities excluded from calculation of net loss per share	423,360	570,824
Series A Convertible Preferred Stock
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Antidilutive securities excluded from calculation of net loss per share	97,000	97,000
Series B Convertible Preferred Stock
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Antidilutive securities excluded from calculation of net loss per share	1,932,667	1,932,667