Marketable Securities (Tables)

6 Months Ended

Sep. 30, 2013

Marketable Securities [Abstract]

Fair Value Of Marketable Securities By Maturity

Total		<1 Year		1–3 Years		3–5 Years
$	87,470,945	$	8,330,034	$	39,604,111	$	39,536,800

Amortized Cost And Approximate Fair Values Of Marketable Securities

	As of September 30, 2013									As of March 31, 2013
	Adjusted Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value		Adjusted Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
Corporate bonds	$	81,012,705	$	1,802,036	$	(348,139	)	$	82,466,602	$	72,923,502	$	2,378,845	$	(4,187	)	$	75,298,160
Municipal bonds	4,970,757		47,682		(14,096		)	5,004,343		7,381,223		81,058		(9,155		)	7,453,126
Total	$	85,983,462	$	1,849,718	$	(362,235	)	$	87,470,945	$	80,304,725	$	2,459,903	$	(13,342	)	$	82,751,286

Gross Unrealized Losses And Fair Values Of Investments By Investment Category And Length Of Time

		Less Than 12 Months					12 Months or Greater				Total
		Fair Market Value		Gross Unrealized Losses			Fair Market Value		Gross Unrealized Losses		Fair Market Value		Gross Unrealized Losses
As of September 30, 2013
	Corporate bonds	$	26,514,541	$	(348,139	)	$	-	$	-	$	26,514,541	$	(348,139	)
	Municipal bonds	1,429,010		(14,096		)	-		-		1,429,010		(14,096		)
	Total	$	27,943,551	$	(362,235	)	$	-	$	-	$	27,943,551	$	(362,235	)
As of March 31, 2013
	Corporate bonds	$	1,171,976	$	(4,187	)	$	-	$	-	$	1,171,976	$	(4,187	)
	Municipal bonds	508,607		(9,155		)	-		-		508,607		(9,155		)
	Total	$	1,680,583	$	(13,342	)	$	-	$	-	$	1,680,583	$	(13,342	)