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Fair Value Measurements (Details) (USD $)
|
Dec. 31, 2013
|
Mar. 31, 2013
|
|---|---|---|
| Available-for-sale securities, fair value | $ 90,877,946 | $ 82,751,286 |
|
Fair Value, Inputs, Level 1 [Member]
|
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| Available-for-sale securities, fair value | 85,899,526 | 75,298,160 |
|
Fair Value, Inputs, Level 2 [Member]
|
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| Available-for-sale securities, fair value | $ 4,978,420 | $ 7,453,126 |