Summary of Stock Option (Detail) (USD $)	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Schedule Of Stock Options [Line Items]
Number of Options, Outstanding	50,000
Non Employee Director Stock Options Plan, 2004
Schedule Of Stock Options [Line Items]
Number of Options, Outstanding	50,000	50,000	50,000
Number of Options, Exercisable	50,000
Weighted Average Exercise Price, Outstanding	$ 3.13	$ 3.13	$ 3.13
Weighted Average Exercise Price, Exercisable	$ 3.13