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Research and Development Expenses - Schedule of Research and Development Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Total research and development expenses, net $ 1,532 $ 1,606
Research and Development Expense [Member]    
Salaries and related expenses 754 1,268
Professional fees 462 32
Regulations related 96 28
Patents 68 80
Materials 73 97
Depreciation 32 32
Vehicle maintenance 47 58
Other 11
Total research and development expenses, net $ 1,532 $ 1,606