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Warrants And Other Derivatives (Schedule Of The Fair Value Of The Warrants Using The Black-Scholes Option Pricing Model) (Details) (USD $)	3 Months Ended		0 Months Ended	3 Months Ended	0 Months Ended		3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Apr. 04, 2012 Securities Purchase Agreement [Member]	Jun. 30, 2012 Securities Purchase Agreement [Member]	Jun. 30, 2012 Loan And Security Agreement [Member]	Jun. 05, 2012 Loan And Security Agreement [Member]	Jun. 30, 2012 Loan And Security Agreement [Member]
Risk-free interest rate	0.90%	1.90%	1.19%	0.77%	0.80%	0.77%
Expected annual dividend yield			0.00%	0.00%	0.00%	0.00%
Expected volatility	72.00%	67.50%	80.00%	80.84%	80.32%	79.90%
Term	5 years 10 months 24 days	5 years 10 months 24 days	5 years 6 months	5 years 3 months 11 days		5 years 6 months	5 years 5 months 9 days
Fair Value			$ 7,000,000	$ 8,500,000	$ 500,000	$ 400,000	$ 500,000

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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