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Carrying Amounts and Fair Values of Company's Financial Instruments (Detail) - USD ($)
Mar. 31, 2015
Mar. 31, 2014
Liabilities    
Financial Liabilities Fair Value Disclosure $ 2,586,854  
Fair Value, Inputs, Level 1    
Liabilities    
Financial Liabilities Fair Value Disclosure 0  
Fair Value, Inputs, Level 2    
Liabilities    
Financial Liabilities Fair Value Disclosure 0  
Fair Value, Inputs, Level 3    
Liabilities    
Financial Liabilities Fair Value Disclosure 2,586,854  
Warranty Liability    
Liabilities    
Financial Liabilities Fair Value Disclosure 2,144,496 $ 2,354,624
Warranty Liability | Fair Value, Inputs, Level 1    
Liabilities    
Financial Liabilities Fair Value Disclosure 0 0
Warranty Liability | Fair Value, Inputs, Level 2    
Liabilities    
Financial Liabilities Fair Value Disclosure 0 0
Warranty Liability | Fair Value, Inputs, Level 3    
Liabilities    
Financial Liabilities Fair Value Disclosure 2,144,496 $ 2,354,624
Conversion Feature Liability    
Liabilities    
Financial Liabilities Fair Value Disclosure 442,358  
Conversion Feature Liability | Fair Value, Inputs, Level 1    
Liabilities    
Financial Liabilities Fair Value Disclosure 0  
Conversion Feature Liability | Fair Value, Inputs, Level 2    
Liabilities    
Financial Liabilities Fair Value Disclosure 0  
Conversion Feature Liability | Fair Value, Inputs, Level 3    
Liabilities    
Financial Liabilities Fair Value Disclosure $ 442,358