ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Liquidity and Going Concern (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Net loss	$ (48,978)	$ (50,007)
Accumulated deficit	(315,293)		$ (266,315)
Cash and cash equivalents and investments	$ 67,700
Substantial Doubt about Going Concern, within One Year	true