Quarterly report pursuant to Section 13 or 15(d)

Property and equipment, net

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Property and equipment, net
 3 Months Ended
Mar. 31, 2018
Property, Plant and Equipment [Abstract]  
Property and equipment, net

5.         Property and equipment, net

 

Property and equipment, net, consisted of the following (in thousands):

 

    Useful Life     March 31,     December 31,  
Asset Class   (Years)     2018     2017  
                   
Operational equipment     3-10     $ 15,478     $ 15,457  
Lab equipment     5       685       685  
Computer equipment     3       174       174  
Office furniture and equipment     3       326       326  
Leasehold improvements     5-7       1,408       1,408  
Land     —       1,047       1,047  
Building     39       24,859       24,847  
Asset retirement cost     20       670       670  
Equipment under construction             6,147       4,552  
              50,794       49,166  
Less:  accumulated depreciation             (4,211 )     (3,433 )
                         
Total property and equipment, net           $ 46,583     $ 45,733  

 

Depreciation expense was $0.8 million and $0.7 million for the three months ended March 31, 2018 and 2017, respectively. Equipment under construction is primarily AquaRefining modules manufactured by the Company to be used in the McCarran, Nevada recycling plant.