Stockholders' Equity (Schedule Of Stock Purchase Right Activity) (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Stockholders Equity Schedule Of Stock Purchase Right Activity Details
Balance at beginning of year	966,400	886,445	353,720
Granted	443,436	563,100	836,432
Vested	(367,017)	(326,683)	(175,269)
Forfeited	(84,244)	(156,462)	(128,438)
Balance at end of year	958,575	966,400	886,445
Weighted-average grant date fair market value, beginning balance	$ 2.50	$ 1.51	$ 0.71
Weighted-average grant date fair market value of restricted stock rights granted	$ 5.75	$ 3.64	$ 1.72
Weighted-average grant date fair market value, released during period	$ 2.14	$ 1.55	$ 0.96
Weighted-average grant date fair market value, forfeited during period	$ 2.89	$ 2.99	$ 1.46
Weighted-average grant date fair market value, ending balance	$ 4.11	$ 2.50	$ 1.51