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Goodwill and Other Intangible Assets
 12 Months Ended
Dec. 31, 2023
Goodwill and Other Intangible Assets [Abstract]  
Goodwill and Other Intangible Assets
Note 3 – Goodwill and Other Intangible Assets

The Company performs its annual goodwill impairment test as of the first day of the fiscal fourth quarter.  No impairment was identified as a result of the Company's annual impairment tests for 2023, 2022, and 2021.

The changes in the carrying amount of goodwill by segment for the years ended December 31, 2023 and 2022 were as follows:

    MOSFETs    
Optoelectronic
Components
    
Resistors
    
Inductors
    
Total
  
                               
Balance at December 31, 2021
   $ -    
$
96,849
    
$
42,605
    
$
25,815
    
$
165,269
  
MaxPower acquisition
     36,885      
-
      
-
      
-
      
36,885
  
Exchange rate effects
     -      
-
      
(722
)
    
-
      
(722
)
Balance at December 31, 2022
   $ 36,885    
$
96,849
    
$
41,883
    
$
25,815
    
$
201,432
  
Centerline acquisition
     -      
-
      
2,213
      
-
      
2,213
  
Purchase price allocation adjustment
     (2,639 )     -       -       -       (2,639 )
Exchange rate effects
     -      
-
      
410
      
-
      
410
  
Balance at December 31, 2023
   $ 34,246    
$
96,849
    
$
44,506
    
$
25,815
    
$
201,416
  

Other intangible assets are as follows:

   
December 31,
2023
    
December 31,
2022
  
             
Intangible assets subject to amortization:
            
Patents and acquired technology
  
$
26,053
    
$
26,988
  
Capitalized software
    
62,360
      
58,735
  
Customer relationships
    
83,895
      
82,816
  
Tradenames
    
22,300
      
22,933
  
Other
    
400
      
400
  
     
195,008
      
191,872
  
Accumulated amortization:
                
Patents and acquired technology
    
(14,931)
      
(14,743
)
Capitalized software
    
(54,203)
      
(53,348
)
Customer relationships
    
(38,664)
      
(33,021
)
Tradenames
    
(14,610)
      
(12,731
)
Other
    
(267)
      
(133
)
     
(122,675)
      
(113,976
)
Net intangible assets subject to amortization
  
$
72,333
    
$
77,896
  

Amortization expense (excluding capitalized software) was $9,916, $8,127, and $7,790, for the years ended December 31, 2023, 2022, and 2021, respectively.

Estimated annual amortization expense of intangible assets on the balance sheet at December 31, 2023 for each of the next five years is as follows:

2024
  
$
9,832
  
2025
    
9,372
  
2026
    
8,555
  
2027
    
6,734
  
2028
    
5,975