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Warrants And Other Derivatives (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended	0 Months Ended	3 Months Ended	6 Months Ended	0 Months Ended		3 Months Ended	6 Months Ended	0 Months Ended	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Apr. 04, 2012 Securities Purchase Agreement [Member]	Sep. 30, 2012 Securities Purchase Agreement [Member]	Sep. 30, 2012 Securities Purchase Agreement [Member]	Apr. 04, 2012 Securities Purchase Agreement [Member] Maximum [Member]	Apr. 04, 2012 Securities Purchase Agreement [Member] Minimum [Member]	Sep. 30, 2012 Convertible Bond [Member]	Sep. 30, 2012 Convertible Bond [Member]	Jun. 05, 2012 Loan And Security Agreement [Member]	Sep. 30, 2012 Loan And Security Agreement [Member]
Derivative [Line Items]
Exercise price			$ 5.45							$ 3.59
Shares warranted to purchase			3,100,000							139,276
Percentage in excess of Maximum Percentage						9.99%	4.99%
Change in fair value of warrants				$ (1,500,000)				$ (1,000,000)	$ (1,000,000)		$ (100,000)
Unrealized Gain (Loss) on Derivatives								(1,700,000)	(1,700,000)
Change in fair value of derivatives and warrants	$ 3,285,000	$ 897,000		$ (1,500,000)	$ 100,000
Warrant exercise, waiting period				6 months	6 months
Warrant exercise period				5 years	5 years
Required notification period				61 days	61 days
Convertible Debt Instrument Redemption Waiting Period	1 year	1 year
Convertible Debt Instrument Contractual Term	30 months	30 months