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Inventories
 12 Months Ended
Dec. 31, 2022
Inventory Disclosure [Abstract]  
Inventories
4.
Inventories

Inventories consisted of the following:

 

 

December 31,

 

(table only in thousands)

 

2022

 

 

2021

 

Raw materials

 

$

19,774

 

 

$

13,405

 

Work in process

 

 

7,183

 

 

 

5,147

 

Finished goods

 

 

2,436

 

 

 

674

 

Obsolescence allowance

 

 

(2,867

)

 

 

(2,174

)

Total inventories

 

$

26,526

 

 

$

17,052

 
Amounts credited to the allowance for obsolete inventory and charged to cost of sales amounted to $0.1 million, $0.1 million and $0.5 million during 2022, 2021 and 2020, respectively. Items charged to the allowance for inventory write-offs were zero, $0.9 million and $0.1 million, during 2022, 2021 and 2020, respectively.