XML 51 R41.htm IDEA: XBRL DOCUMENT v3.20.2
Inventory (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory Net [Abstract]    
Finished goods $ 520 $ 105
Work-in-process 1,262 1,229
Raw materials and supplies 31,911 35,023
Inventory $ 33,693 $ 36,357