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Inventories
12 Months Ended
Dec. 31, 2023
Inventories  
Inventories

Note 12.  Inventories

    

December 31, 

December 31, 

2022

    

2023

(in thousands)

Finished goods

$

63,425

47,468

Work in process

 

169,166

96,955

Raw materials

 

138,086

72,692

Supplies

 

256

193

$

370,933

217,308

The amounts of inventories that were charged to cost of revenues were $789,071 thousand, $692,022 thousand and $660,391 thousand, for the years ended December 31, 2021, 2022 and 2023, respectively, and the charges for inventories written down to net realizable value amounted to $9,448 thousand, $22,211 thousand and $21,540 thousand, for the years ended December 31, 2021, 2022 and 2023, respectively, which were also included in cost of revenues.

As of December 31, 2022 and 2023, none of the Company’s inventories was pledged as collateral.