|
Marketable Securities (Amortized Cost And Approximate Fair Values Of Marketable Securities) (Details) (USD $)
|
Dec. 31, 2013
|
Mar. 31, 2013
|
|---|---|---|
| Schedule of Investments [Line Items] | ||
| Adjusted Cost | $ 89,628,926 | $ 80,304,725 |
| Gross Unrealized Gains | 1,746,731 | 2,459,903 |
| Gross Unrealized Losses | (497,711) | (13,342) |
| Fair Market Value | 90,877,946 | 82,751,286 |
|
Corporate Bonds [Member]
|
||
| Schedule of Investments [Line Items] | ||
| Adjusted Cost | 84,677,016 | 72,923,502 |
| Gross Unrealized Gains | 1,716,210 | 2,378,845 |
| Gross Unrealized Losses | (493,700) | (4,187) |
| Fair Market Value | 85,899,526 | 75,298,160 |
|
Municipal Bonds [Member]
|
||
| Schedule of Investments [Line Items] | ||
| Adjusted Cost | 4,951,910 | 7,381,223 |
| Gross Unrealized Gains | 30,521 | 81,058 |
| Gross Unrealized Losses | (4,011) | (9,155) |
| Fair Market Value | $ 4,978,420 | $ 7,453,126 |