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Stock Compensation - Amended and Restated 1997 Stock Option Plan of Global-Tech - Additional Information (Detail) (USD $)
12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options exercisable period 3 years 10 months 6 days 4 years 7 months 6 days 4 years 2 months 1 day
Number of options, Forfeited   5,950 1,250
Exercise price of option   $ 21.26 $ 29.45
Number of options, expired 65,500   82,167
Exercise price of option $ 30.55   $ 19.22
Amended and Restated 1997 Stock Option Plan of Global-Tech [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares of common stock available for grant 400,000    
Stock option plan expiration date Sep. 17, 2008    
Percentage of fair market value of stock granted 110.00%    
Number of options, Forfeited   5,950 1,250
Number of options, expired 65,500   82,167
Minimum exercise price of option     $ 19.00
Maximum exercise price of option     $ 25.00
Options granted to directors     65,500
Amended and Restated 1997 Stock Option Plan of Global-Tech [Member] | Exercise price one [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise price of option   $ 15.60 $ 25.00
Exercise price of option $ 30.40    
Amended and Restated 1997 Stock Option Plan of Global-Tech [Member] | Exercise price range two [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Exercise price of option   $ 30.56 $ 30.56
Exercise price of option $ 30.56    
Amended and Restated 1997 Stock Option Plan of Global-Tech [Member] | Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Voting rights 10.00%    
Amended and Restated 1997 Stock Option Plan of Global-Tech [Member] | Minimum [Member] | Common Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Voting rights 10.00%    
Amended and Restated 1997 Stock Option Plan of Global-Tech [Member] | Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Term of ISO granted 10 years    
Options exercisable period 10 years    
Amended and Restated 1997 Stock Option Plan of Global-Tech [Member] | Maximum [Member] | Common Stock [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Term of ISO granted 5 years