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Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid expenses $ 15 $ 92
Governmental authorities 41 26
Other receivable (Note 3c) 10 260
Other current assets $ 66 $ 378