|
Fair Value Measurements (Details) (USD $)
|
Mar. 31, 2013
|
Mar. 31, 2012
|
|---|---|---|
| Marketable securities, fair value | $ 82,751,286 | $ 71,996,927 |
|
Level 1 [Member]
|
||
| Marketable securities, fair value | 75,298,160 | 51,918,559 |
|
Level 2 [Member]
|
||
| Marketable securities, fair value | $ 7,453,126 | $ 20,078,368 |