XML 47 R36.htm IDEA: XBRL DOCUMENT v3.19.2
Inventory (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Dec. 31, 2018
Inventory    
Raw materials and supplies - production locations $ 47,324 $ 32,941
Raw materials and supplies - customer locations 9,247 6,755
Work-in-process 12,538 5,589
Finished goods 4,081 2,625
Total Inventory $ 73,190 $ 47,910