Marketable Securities (Narratives) (Details) (USD $)	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Gain (Loss) on Investments [Line Items]
Marketable securities, realized loss, other than temporary impairments, description	In accordance with ASC Topic 320-10-35-30 “Investments – Debt & Equity Securities – Subsequent Measurement,” the Company reviews its marketable securities for declines in market value that may be considered other-than-temporary. The Company generally considers market value declines to be other-than-temporary if there are declines for a period longer than six months and in excess of 20% of original cost, or when other evidence indicates impairment.  We also consider the nature of the underlying investments, our intent and ability to hold the investments until their market values recover, and other market conditions in making this assessment.
Minimum decline in value of marketable securities to be called as other than temporaty impairment period	6 months
Minimum decline in value of marketable securities to be called as other than temporary impairment percent	20.00%
Marketable securities, realized gain (loss)	$ 25,000	$ 36,000