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ACCOUNTS PAYABLE AND ACCRUED EXPENSES AND SECURED PROMISSORY NOTE (Tables)
9 Months Ended
Sep. 30, 2020
Payables and Accruals [Abstract]  
Accounts payable and accrued expenses
    September 30,     December 31,  
    2020     2019  
Accounts payable   $ 646     $ 673  
Accrued compensation     1,402       1,635  
Other accrued expenses     418       208  
    $ 2,466     $ 2,516