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ACCOUNTS PAYABLE AND ACCRUED EXPENSES AND SECURED PROMISSORY NOTE (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Accounts payable $ 646 $ 673
Accrued compensation 1,402 1,635
Other accrued expenses 418 208
Accounts payable and accrued expenses $ 2,466 $ 2,516