Segment Information (Schedule Of Revenue By Geographic Region) (Details) (USD $)	12 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Revenue	$ 27,033,419	$ 28,579,220	$ 31,197,063
United States [Member]
Revenue	12,006,493	13,334,563	14,169,952
Europe [Member]
Revenue	10,666,338	10,798,146	12,009,294
Asia [Member]
Revenue	3,979,862	4,130,930	4,576,270
Other Credit Derivatives [Member]
Revenue	$ 380,726	$ 315,581	$ 441,547

$ 27,033,419

$ 28,579,220

$ 31,197,063

12,006,493

13,334,563

14,169,952

10,666,338

10,798,146

12,009,294

3,979,862

4,130,930

4,576,270

$ 380,726

$ 315,581

$ 441,547