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Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Current assets    
Due from Government institutions $ 1,442 $ 607
Income tax receivable 453 122
Prepaid expenses 368 561
Deposits for operating leases 193 167
Due from related parties (See Note 17) 133 681
Other 24 1,077
Other current assets $ 2,613 $ 3,215