Post-effective amendment to a registration statement that is not immediately effective upon filing

BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 25, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Jun. 25, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Conversion basis for conversion of the then-issued and outstanding ordinary shares of predecessor into successor shares (in shares) 1              
Shares issued (in shares) 7,500,000              
Private placement warrants issued (in shares) 5,263,500              
Shares called upon by private placement warrants (in shares) 2,631,750       2,631,750      
Operating profit   $ (3,064,000) $ (33,322,000) $ (6,106,000) $ (38,181,000)   $ 29,676,000 $ 27,752,000
Restructuring and other expenses   1,657,000 0 1,052,000 0   $ 2,193,000 $ 9,461,000
Accrued severance expense   1,000,000.0   1,000,000.0   $ 1,000,000.0    
Warrant liabilities   (7,999,000)   0   0    
Change in fair value of warrant liabilities   2,362,000 0          
Facility Closing                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Restructuring and other expenses   $ 1,700,000       0    
Restatement adjustment                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Warrant liabilities       (8,100,000)   (8,100,000)    
Change in fair value of warrant liabilities           1,200,000    
Restatement adjustment | Merisant and Mafco Worldwide                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Transaction costs       $ 1,100,000   $ 1,100,000    
Restatement adjustment | ASU 2017-07                
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                
Operating profit     $ 100,000   $ 100,000