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Inventories
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consisted of the following:
 
December 31,
 
2018
 
2017
Raw material
$
1,201

 
$
298

Work in progress
10,070

 
7,825

Finished goods
4,648

 
832

Spare parts
1,356

 
577

Total sand inventory
17,275

 
9,532


Wellsite storage solutions inventory represents work in progress inventory related to existing arrangements at the time the Company acquired Quickthree and consisted of the following:
 
December 31,
 
2018
 
2017
Work in progress
$
1,300

 
$

Total wellsite storage solutions inventory
$
1,300

 
$

 
 
 
 
Total inventory
$
18,575

 
$
9,532