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Fair Value Measurements (Details) (USD $)
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Sep. 30, 2014
|
Mar. 31, 2014
|
|---|---|---|
| Available-for-sale securities, fair value | $ 99,176,144 | $ 94,382,401 |
|
Fair Value, Inputs, Level 1 [Member]
|
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| Available-for-sale securities, fair value | 96,755,801 | 89,934,059 |
|
Fair Value, Inputs, Level 2 [Member]
|
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| Available-for-sale securities, fair value | $ 2,420,343 | $ 4,448,342 |