Basis of Presentation (Summary Of Stock Options Outstanding And Exercisable) (Details) (USD $)			6 Months Ended
	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2014 $0.55 - $1.26	Sep. 30, 2014 $1.27 - $1.79	Sep. 30, 2014 $1.80 - $5.87	Sep. 30, 2014 $5.88 - $9.74	Sep. 30, 2014 $10.97 - $11.26	Sep. 30, 2014 $0.55 - $11.26
Range of Exercise Prices, Minimum			$ 0.55	$ 1.27	$ 1.80	$ 5.88	$ 10.97	$ 0.55
Range of Exercise Prices, Maximum			$ 1.26	$ 1.79	$ 5.87	$ 9.74	$ 11.26	$ 11.26
Options Outstanding, Number of Shares	5,347,784	6,002,382	1,453,500	1,103,128	1,305,184	1,335,972	150,000	5,347,784
Options Outstanding, Weighted-Average Exercise Price Per Share	$ 4.16	$ 4.14	$ 1.03	$ 1.54	$ 4.68	$ 9.35	$ 11.11
Options Outstanding, Weighted-Average Remaining Contractual Term (in years)			3 years 110 days	1 year 183 days	6 years 37 days	9 years	9 years 110 days
Options Outstanding, Aggregate Intrinsic Value			$ 8,208,733	$ 5,673,510	$ 2,607,072	$ 33,180	$ 0	$ 16,522,495
Options Exercisable, Number of Shares			1,453,500	1,103,128	869,566	294,442	0	3,720,636
Options Exercisable, Weighted-Average Exercise Price Per Share			$ 1.03	$ 1.54	$ 4.30	$ 9.40	$ 0
Options Exercisable, Aggregate Intrinsic Value			$ 8,208,733	$ 5,673,510	$ 2,059,942	$ 15,899	$ 0	$ 15,958,084