Available-for-Sale Investments - Additional Information (Detail) (USD $)	12 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Amortized Cost And Fair Value Debt Securities [Abstract]
Total investments	$ 2,235	$ 2,335
Unrealized loss on investments	(1,839)	(1,952)
Unlisted investments maturity term	2 years
Gross unrealized gain on securities	61,054	38,680	14,676
Gross unrealized loss on securities	1,839	1,952	1,913
Proceeds from disposal of available-for-sale investments	$ 2,000,000	$ 9,000,000	$ 15,986,532

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

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This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and losses recognized for other than temporary impairments (OTTI) of the subject investments.

+ References

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+ Details

- Definition

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

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+ Details