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Supplemental Cash Flow Information (Detail) (USD $)	9 Months Ended
Supplemental Cash Flow Information (Detail) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Income taxes paid	$ 3,306,000	$ 3,765,000
Interest paid	0	0
Accrued dividends	$ 883,928	$ 883,928

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.