XML 51 R39.htm IDEA: XBRL DOCUMENT v3.20.2
Inventories - Schedule of Inventories (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 7,936 $ 9,587
Work-in-process 11,635 14,027
Finished products 28,685 20,712
Field/consignment 33,790 38,071
Inventories $ 82,046 $ 82,397