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SUBSEQUENT EVENTS (Details) - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Apr. 02, 2021
Apr. 01, 2021
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Apr. 13, 2020
Subsequent Event [Line Items]            
Common stock, par value     $ 0.01   $ 0.01  
Proceeds from issuance of common stock     $ 1,260 $ 1,350    
Class of warrant, number of securities called by warrants     905,901      
Sales Agreement with Alliance Global Partners            
Subsequent Event [Line Items]            
Maximum aggregate initial offering price           $ 50,000
Subsequent Events            
Subsequent Event [Line Items]            
Proceeds from Issuance of Warrants   $ 400        
Class Of Warrant Or Right Warrants Or Rights Exercised   74,000        
Class of warrant, number of securities called by warrants   74,000        
Subsequent Events | Sales Agreement with Alliance Global Partners            
Subsequent Event [Line Items]            
Common stock, par value $ 0.01          
Proceeds from issuance of common stock $ 15,400          
Percentage of cash fee 3.00%          
Sale of common stock 4,501,000          
Subsequent Events | Sales Agreement with Alliance Global Partners | Maximum            
Subsequent Event [Line Items]            
Proceeds from issuance of common stock $ 22,000