Quarterly report pursuant to Section 13 or 15(d)

Inventories - Schedule of Inventory on Hand by Segment (Detail)

v3.20.2
Inventories - Schedule of Inventory on Hand by Segment (Detail) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Inventory [Line Items]    
Reserve for obsolescence $ (1,447) $ (1,271)
Inventories, net 618 717
Book Inventories [Member]    
Inventory [Line Items]    
Inventories, gross 2,065 1,988
Reserve for obsolescence (1,447) (1,271)
Inventories, net $ 618 $ 717