Stock-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)	9 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at Period End, Options	3,605,526	4,496,168
Outstanding, Weighted Average Remaining Contractual Life	4 years 8 months 12 days	4 years 9 months 18 days	4 years 8 months 12 days	3 years 10 months 24 days
Exercisable, Weighted Average Remaining Contractual Life	3 years 10 months 24 days	3 years 3 months 18 days
Vested and expected to vest, Weighted Average Remaining Contractual Life	4 years 8 months 12 days	4 years 8 months 12 days
Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at Period Start, Options	4,251,695	3,228,210	3,228,210
Granted, Options	89,340	1,418,792
Exercised, Options	(12,794)
Forfeited, Options	(736,604)	(176,420)
Outstanding at Period End, Options	3,591,637	4,470,582
Exercisable, Options	2,895,111	3,309,967
Vested and expected to vest, Options	3,555,224	4,413,233
Outstanding at Period Start, Weighted-Average Exercise Price	$ 2.14	$ 2.78	$ 2.78
Granted, Weighted-Average Exercise Price	$ 1.11	$ 0.87
Exercised, Weighted-Average Exercise Price	$ 0.89
Forfeited, Weighted-Average Exercise Price	$ 2.69	$ 2.97
Outstanding at Period End, Weighted-Average Exercise Price	$ 2.01	$ 2.17
Exercisable, Weighted-Average Exercise Price	$ 2.23	$ 2.50
Vested and expected to vest, Weighted-Average Exercise Price	$ 2.02	$ 2.18
Exercised, Aggregate Intrinsic Value	$ 15,689
Outstanding at Period End, Aggregate Intrinsic Value	1,859,201
Exercisable, Aggregate Intrinsic Value	1,102,526
Vested and expected to vest, Aggregate Intrinsic Value	$ 1,818,171