XML 25 R12.htm IDEA: XBRL DOCUMENT v3.19.1
Property, Plant and Equipment, net
 3 Months Ended
Mar. 31, 2019
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, net
Property, Plant and Equipment, net
Net property, plant and equipment consisted of:
 
March 31, 2019
 
December 31, 2018
Machinery, equipment and tooling
$
15,327

 
$
14,858

Wellsite proppant storage solutions
7,805

 
5,286

Vehicles
1,983

 
1,955

Furniture and fixtures
1,175

 
1,140

Plant and building
159,785

 
158,882

Real estate properties
4,621

 
4,601

Railroad and sidings
27,347

 
27,347

Land and land improvements
27,395

 
27,167

Asset retirement obligation
16,356

 
16,469

Mineral properties
10,075

 
10,075

Deferred mining costs
1,806

 
1,806

Construction in progress
24,027

 
21,619

 
297,702

 
291,205

Less: accumulated depreciation and depletion
48,569

 
42,809

Total property, plant and equipment, net
$
249,133

 
$
248,396


Depreciation expense was $5,868 and $3,158 for the three months ended March 31, 2019 and 2018, respectively. Depletion expense was $5 and $2 for the three months ended March 31, 2019 and 2018, respectively.
The Company capitalized no interest expense associated with the construction of new property, plant and equipment for the three months ended March 31, 2019 and 2018.