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Inventories (Tables)
12 Months Ended
Dec. 31, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory on Hand by Segment
The following table provides details of inventory on hand:
 
   
December 31, 2019
   
December 31, 2020
 
   
(Dollars in thousands)
 
Book inventories
  $1,988   
$
1,994
 
Reserve for obsolescence
   (1,271  
 
(1,499
   
 
 
   
 
 
 
Inventory, net
  $717   
$
495