Marketable Securities (Narrative) (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013
Schedule of Investments [Line Items]
Gross unrealized losses	$ 362,235	$ 13,342
Municipal Bonds [Member]
Schedule of Investments [Line Items]
Gross unrealized losses	$ 14,096	$ 9,155

Amount of the excess of amortized cost basis over fair value of securities in a loss position and categorized neither as held-to-maturity nor trading securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 6

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant