Quarterly report pursuant to Section 13 or 15(d)

Property and Equipment, Net (Details)

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Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Components of property and equipment    
Total $ 1,578 $ 2,683
Less accumulated depreciation (1,411) (2,150)
Property and equipment, net 167 533
Vehicles [Member]    
Components of property and equipment    
Total 681 777
Equipment [Member]    
Components of property and equipment    
Total 262 764
Software [Member]    
Components of property and equipment    
Total 176
Computers and Office Equipment [Member]    
Components of property and equipment    
Total $ 635 $ 966