SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2022 USD ($)	Jan. 01, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jul. 23, 2021	Mar. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Significant Accounting Policies [Line Items]
Exchange ratio								160.3
Revenue recognized	$ 70	$ 135	$ 549	$ 1,321
Operating lease right-of-use assets	17,123		17,123			$ 18,826	$ 0
Present value of operating lease liabilities	17,042		17,042			18,776
Operating lease liabilities, current	2,106		2,106				0
Stockholders' equity, including portion attributable to noncontrolling interest	654,004	(451,306)	654,004	(451,306)	$ 657,375		686,698		$ (415,828)	$ (384,602)
Accumulated deficit
Significant Accounting Policies [Line Items]
Stockholders' equity, including portion attributable to noncontrolling interest	$ (720,923)	$ (465,457)	$ (720,923)	$ (465,457)	$ (676,741)		$ (632,099)		$ (426,309)	$ (397,996)
Cumulative Effect, Period of Adoption, Adjustment
Significant Accounting Policies [Line Items]
Stockholders' equity, including portion attributable to noncontrolling interest						(866)
Cumulative Effect, Period of Adoption, Adjustment | Accumulated deficit
Significant Accounting Policies [Line Items]
Stockholders' equity, including portion attributable to noncontrolling interest						$ (866)