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DEBT OBLIGATIONS - Narrative (Details)
12 Months Ended
Aug. 01, 2021
USD ($)
Apr. 29, 2020
USD ($)
advance
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2019
Debt Instrument [Line Items]            
Amortization of debt discount and issuance costs     $ 12,000 $ 8,000    
Term Loan            
Debt Instrument [Line Items]            
Debt discount     $ 16,000      
Secured Debt            
Debt Instrument [Line Items]            
Interest rate, stated percentage     4.00% 4.00%    
Secured Debt | Term Loan            
Debt Instrument [Line Items]            
Maximum available amount   $ 8,000,000        
Number of term advances | advance   3        
Interest rate, stated percentage   4.00%        
Letter of credit $ 2,000,000          
Interest rate, effective percentage           5.00%
Secured Debt | Term Loan | Prime Rate            
Debt Instrument [Line Items]            
Variable interest rate   0.75%        
Secured Debt | First term            
Debt Instrument [Line Items]            
Maximum available amount         $ 6,000,000  
Term advance   $ 29,800,000        
Secured Debt | Second term            
Debt Instrument [Line Items]            
Maximum available amount   1,000,000     $ 1,000,000  
Secured Debt | Third term            
Debt Instrument [Line Items]            
Term advance   $ 39,900,000