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Net Gratuity Cost (Detail) (USD $)
12 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2011
Compensation And Retirement Disclosure [Abstract]      
Service cost $ 75,039 $ 78,983 $ 74,660
Interest cost 44,025 41,987 36,731
Recognized net actuarial (gain) loss 14,941 (10,478) (16,687)
Net gratuity cost $ 134,005 $ 110,492 $ 94,704