Share Based Awards (Details Textual) (USD $)	3 Months Ended		6 Months Ended			6 Months Ended					0 Months Ended						6 Months Ended			3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014	Sep. 30, 2014 Employee Stock Option [Member]	Sep. 30, 2014 Restricted Stock Units Award [Member]	Sep. 30, 2013 Restricted Stock Units Award [Member]	Mar. 31, 2014 Restricted Stock Units Award [Member]	Sep. 30, 2013 Director Options [Member]	Aug. 11, 2014 Purchase Plan [Member]	Sep. 30, 2014 Purchase Plan [Member]	Aug. 11, 2014 Purchase Plan [Member]	Sep. 30, 2014 2005 Stock Options Plan [Member]	Oct. 31, 2005 2005 Stock Options Plan [Member]	Sep. 30, 2014 2005 Stock Options Plan [Member] Restricted Stock Units Award [Member]	Sep. 30, 2014 2005 Stock Options Plan [Member] Employee Option [Member]	Sep. 30, 2014 Employee Stock Option [Member] 2005 Stock Options Plan [Member]	Sep. 30, 2014 Employee Stock Option [Member] 2005 Stock Options Plan [Member] Executive Officer [Member]	Sep. 30, 2014 Performance Based Award [Member]	Sep. 30, 2013 Performance Based Award [Member]	Sep. 30, 2014 Performance Based Award [Member] 2005 Stock Options Plan [Member] Executive Officer [Member]
Share Based Awards (Textual) [Abstract]
Common stock reserved															4,800,000
Outstanding options under 1998 and 2005 plan	1,732,876		1,732,876		1,370,101									1,732,876
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number									64,571							78,872
Shares available for future grants														2,201,788
Expiration period (in years)																	8 years	10 years	8 years
Weighted-average grant date fair value per share of stock options			$ 3.50	$ 5.19
Annualized forfeiture rate for employee options										0.00%
Options granted under 2005 plan			459,650
Vesting period (in years)																	5 years		5 years			3 years
Maximum number of shares per employee (in shares)																			105,000			170,000
Compensation expense	$ 867,000	$ 584,000	$ 1,657,000	$ 1,125,000			$ 392,000	$ 289,000												$ 211,000	$ 2,000
Total unrecognized compensation costs						5,622,000	1,245,000
Stock option recognized over weighted average period (in years)						3 years 6 months 28 days	1 year 6 months
Fair value of options vested	1,524,000			897,000
Employee Stock Purchase Plan [Abstract]
Shares reserved for future grant												4,000,000	4,000,000
Maximum percentage of gross payroll deduction											15.00%
Purchase price as a percentage of fair market value											90.00%
Maximum shares purchase in a single transaction											1,500
Maximum amount purchased in a calendar year											$ 25,000