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Accounting And Reporting Policies (Tables)
 12 Months Ended
Dec. 31, 2012
Accounting And Reporting Policies [Abstract]  
Subsidiaries of the Company
As of December 31, 2012, the subsidiaries of the Company are as follows:
 
Owned By The LGL Group, Inc.
M-tron Industries, Inc.                                                                                                                                                            
100.0%
M-tron Industries, Ltd.                                                                                                                                                          
99.9%
Piezo Technology, Inc.                                                                                                                                                          
100.0%
Piezo Technology India Private Ltd.                                                                                                                                                    
99.0%
Lynch Systems, Inc.                                                                                                                                                            
100.0%
Estimated aggregate future amortization expense for intangible assets, excluding goodwill
The estimated aggregate amortization expense for intangible assets, excluding goodwill, for each of the remaining years of the estimated useful life is as follows (in thousands):
2013                                                                                                                                                            
  
58
 
2014                                                                                                                                                            
  
38
 
Total                                                                                                                                                            
 
$
96