Quarterly report pursuant to Section 13 or 15(d)

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

v3.21.2
Inventories - Schedule of Inventory on Hand by Segment (Detail) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Inventory [Line Items]    
Reserve for obsolescence $ (1,508) $ (1,499)
Inventory, net 719 495
Book Inventories [Member]    
Inventory [Line Items]    
Inventories, gross 2,227 1,994
Reserve for obsolescence (1,508) (1,499)
Inventory, net $ 719 $ 495