Share Based Awards (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended			6 Months Ended							6 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Sep. 30, 2013 Employee Stock Option [Member]	Sep. 30, 2013 Restricted Stock Units Award [Member]	Sep. 30, 2012 Restricted Stock Units Award [Member]	Sep. 30, 2013 Employee Option [Member]	Sep. 30, 2012 Employee Option [Member]	Sep. 30, 2013 Director Options [Member]	Sep. 30, 2012 Director Options [Member]	Sep. 30, 2013 Nineteen Ninety Eight Plan [Member]	Sep. 30, 1998 Nineteen Ninety Eight Plan [Member]	Sep. 30, 2013 Two Thousand Five Stock Options Plan [Member]	Oct. 31, 2005 Two Thousand Five Stock Options Plan [Member]	May 24, 2012 Performance Based Award [Member]	May 24, 2012 Performance Based Award [Member] Executive Officer [Member]	May 24, 2012 Performance Based Award [Member] Non Executive Employees [Member]
Share Based Awards (Textual) [Abstract]
Common stock reserved														8,000,000		4,800,000
Expiration date of options under 1998 Plan													10 years		10 years
Outstanding options under 1998 and 2005 plan	1,417,409		1,417,409		1,159,183								20,000		1,397,409
Shares available for future grants															2,617,727		600,000
Weighted-average grant date fair value per share of stock options			$ 5.19	$ 8.41
Annualized forfeiture rate for employee options									8.30%	5.80%	0.00%	0.00%
Options granted under 2005 plan			469,000
Maximum number of options available under the equity incentive program																		210,000	390,000
Total unrecognized compensation costs						$ 6,511	$ 1,294
Stock option recognized over weighted average period (in years)						3 years 9 months 24 days	1 year 9 months 12 days
Fair value of options vested	897			1,270
Compensation expense	$ 584	$ 419	$ 1,125	$ 1,383			$ 289	$ 324