General form of registration statement for all companies including face-amount certificate companies

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Shares Reflected in Balance Sheet) (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Schedule of Shares Reflected in Balance Sheet) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Mar. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Feb. 16, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Plus:                
Class A ordinary shares subject to possible redemption   $ 139,990,000     $ 86,997,000 $ 83,573,000 $ 79,700,000 $ 48,001,000
ION Acquisition Corp 2 LTD                
Summary of Significant Accounting Policies [Line Items]                
Proceeds from sale of Units, net of issuance costs   247,940,000            
Less:                
Class A ordinary shares issuance costs   (179,561)            
Plus:                
Proceeds from sale of Private Placement Warrants   7,060,000            
Class A ordinary shares subject to possible redemption $ 253,000,000 253,000,000 $ 253,000,000 $ 253,000,000 $ 0      
ION Acquisition Corp 2 LTD | Class A ordinary shares                
Summary of Significant Accounting Policies [Line Items]                
Proceeds from sale of Units, net of issuance costs   253,000,000            
Less:                
Proceeds allocated to Public and Private Warrants   (30,065,074)            
Class A ordinary shares issuance costs   (14,138,380)            
Plus:                
Proceeds from sale of Private Placement Warrants   7,060,000            
Accretion of temporary equity to redemption value 37,143,454 37,143,454            
Class A ordinary shares subject to possible redemption $ 0 $ 253,000,000 $ 0