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Inventories
12 Months Ended
Dec. 31, 2019
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories consisted of the following:
December 31,
 20192018
Raw material$527  $1,201  
Work in progress14,173  10,070  
Finished goods4,097  4,648  
Spare parts2,618  1,356  
Total sand inventory$21,415  $17,275  
SmartSystems inventory represents work in progress inventory related to existing arrangements at the time the Company acquired Quickthree and consisted of the following:
December 31,
 20192018
Work in progress$—  $1,300  
Total SmartSystems inventory$—  $1,300  
Total inventory$21,415  $18,575