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Note 2 - Acquisitions (Details Textual)
$ in Thousands
3 Months Ended 6 Months Ended 9 Months Ended
Nov. 18, 2024
USD ($)
Nov. 13, 2024
USD ($)
Oct. 28, 2024
USD ($)
shares
Sep. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
Feb. 19, 2024
USD ($)
Jul. 01, 2023
USD ($)
Dec. 31, 2024
USD ($)
Mar. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2024
USD ($)
Jun. 30, 2024
USD ($)
Number of Businesses Acquired               3            
Goodwill               $ 586,712     $ 586,712   $ 586,712 $ 281,283
Business Combination, Acquisition Related Costs               16,400   $ 1,195 18,240 $ 1,696    
Payments to Acquire Businesses, Net of Cash Acquired                     419,652 $ 29,229    
Amran Instrument Transformers [Member]                            
Business Acquisition, Percentage of Voting Interests Acquired     100.00%                      
Business Combination, Consideration Transferred     $ 179,200                      
Payments to Acquire Businesses, Gross     $ 153,200                      
Amran Instrument Transformers [Member] | Common Stock [Member]                            
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares     152,299                      
Amran Instrument Transformers [Member] | Treasury Stock, Common [Member]                            
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares     26                      
Narayan Powertech Pvt. Ltd. [Member]                            
Business Acquisition, Percentage of Voting Interests Acquired     90.10%                      
Payments to Acquire Businesses, Gross     $ 261,600                      
Business Combination, Period for Right to Transfer Remaining Interest (Year)     3 years                      
Business Combination, Period for Right to Acquire Remaining Interest (Year)     3 years                      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill     $ 135,000                      
Finite-Lived Intangible Asset, Useful Life (Year)     12 years                      
Goodwill     $ 298,900                      
Pro Forma Information, Interest Rate Assumption     7.70%                      
Pro Forma Information, Tax Rate Assumed     22.60%                      
Business Combination, Acquisition Related Costs               11,200     12,800      
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual               19,500            
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual               900            
Narayan Powertech Pvt. Ltd. [Member] | Customer Relationships [Member]                            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles     $ 106,300                      
Narayan Powertech Pvt. Ltd. [Member] | Trade Names [Member]                            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets     $ 28,700                      
Narayan Powertech Pvt. Ltd. [Member] | Mold-Tech Singapore [Member] | Scenario, Plan [Member]                            
Business Acquisition, Percentage of Voting Interests Acquired     9.90%                      
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable     $ 26,700                      
Nascent Technology Manufacturing [Member]                            
Business Combination, Consideration Transferred $ 7,600                          
Goodwill $ 6,500                          
Custom Biogenic Systems [Member]                            
Business Combination, Consideration Transferred   $ 4,400                        
Sanyu Switch Co., Ltd [Member]                            
Business Combination, Consideration Transferred         $ 20,931 $ 20,900             20,931  
Payments to Acquire Businesses, Gross         22,178               22,178  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill         2,600     2,900 $ 2,600   2,900   2,900  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets           $ 2,900                
Finite-Lived Intangible Asset, Useful Life (Year)           12 years                
Goodwill         6,696 $ 9,100   9,100 6,696   9,100   9,100  
Payments to Acquire Businesses, Net of Cash Acquired                 22,200          
Business Combination, Consideration Payable         $ 2,464 2,500   2,464 $ 2,464   2,464   2,464  
Sanyu Switch Co., Ltd [Member] | Customer Relationships [Member]                            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles           2,200                
Sanyu Switch Co., Ltd [Member] | Trade Names [Member]                            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets           $ 700                
Minntronixs [Member]                            
Business Combination, Consideration Transferred       $ 29,229                    
Payments to Acquire Businesses, Gross       33,890                    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill       10,700       10,700     10,700   10,700  
Goodwill       $ 13,889       13,900     13,900   13,900  
Payments to Acquire Businesses, Net of Cash Acquired             $ 29,200              
Minntronixs [Member] | Customer-Related Intangible Assets [Member]                            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles               $ 7,500     $ 7,500   $ 7,500  
Finite-Lived Intangible Asset, Useful Life (Year)               15 years     15 years   15 years  
Minntronixs [Member] | Trademarks [Member]                            
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets               $ 3,200     $ 3,200   $ 3,200