|
Marketable Securities (Amortized Cost And Approximate Fair Values Of Marketable Securities) (Details) (USD $)
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Sep. 30, 2014
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Mar. 31, 2014
|
|---|---|---|
| Schedule of Investments [Line Items] | ||
| Adjusted Cost | $ 98,284,085 | $ 93,003,640 |
| Gross Unrealized Gains | 1,144,069 | 1,630,343 |
| Gross Unrealized Losses | (252,010) | (251,582) |
| Fair Market Value | 99,176,144 | 94,382,401 |
|
Corporate Bonds [Member]
|
||
| Schedule of Investments [Line Items] | ||
| Adjusted Cost | 95,870,410 | 88,567,210 |
| Gross Unrealized Gains | 1,137,401 | 1,613,822 |
| Gross Unrealized Losses | (252,010) | (246,973) |
| Fair Market Value | 96,755,801 | 89,934,059 |
|
Municipal Bonds [Member]
|
||
| Schedule of Investments [Line Items] | ||
| Adjusted Cost | 2,413,675 | 4,436,430 |
| Gross Unrealized Gains | 6,668 | 16,521 |
| Gross Unrealized Losses | (4,609) | |
| Fair Market Value | $ 2,420,343 | $ 4,448,342 |