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