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Inventories
 12 Months Ended
Dec. 31, 2021
Inventory Disclosure [Abstract]  
Inventories

5. INVENTORIES

Inventories consist of the following (in thousands):

 

 

December 31,

 

 

 

2021

 

 

2020

 

Finished goods

 

$

21,527

 

 

$

16,461

 

Parts and materials

 

 

20,965

 

 

 

19,098

 

Work in progress

 

 

2,951

 

 

 

2,592

 

Total inventories

 

$

45,443

 

 

$

38,151

 

 

We include freight costs incurred for shipping inventory to our clients in the Cost of product sales caption in the accompanying consolidated statements of operations. See Note 18 - Inventory Write-down for further detail.