Stockholders' Equity (Details Textual) (USD $)	3 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended	1 Months Ended	3 Months Ended				1 Months Ended	3 Months Ended			3 Months Ended	12 Months Ended			1 Months Ended				1 Months Ended			3 Months Ended	1 Months Ended								3 Months Ended		1 Months Ended		0 Months Ended	1 Months Ended		12 Months Ended	104 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Mar. 31, 2013 Approved_Plan	Mar. 31, 2013 RSU plan post May 2006 [Member]	Mar. 31, 2013 Minimum [Member]	May 31, 2013 Minimum [Member] FY2014 Short Term Plan [Member]	Mar. 31, 2013 Maximum [Member]	May 31, 2013 Maximum [Member] FY2014 Short Term Plan [Member]	Jun. 30, 2013 Employee Stock Purchase Plan [Member]	Jun. 30, 2012 Employee Stock Purchase Plan [Member]	Aug. 30, 2012 Employee Stock Purchase Plan [Member]	Aug. 30, 2010 Employee Stock Purchase Plan [Member]	Aug. 31, 2012 Employee Stock Purchase Plan [Member] Two Thousand Twelve Plan [Member]	Jun. 30, 2013 Stock Repurchase Program - Open Market [Member]	Apr. 30, 2011 Company's 2011 Equity Incentive Plan [Member] Minimum [Member]	Apr. 30, 2011 Company's 2011 Equity Incentive Plan [Member] Maximum [Member]	Jun. 30, 2013 Restricted Stock Units [Member]	Mar. 31, 2013 Restricted Stock Units [Member]	Mar. 31, 2013 Restricted Stock Units [Member] RSU plan prior to May 2006 [Member]	Mar. 31, 2013 Restricted Stock Units [Member] RSU plan post May 2006 [Member] quarter	Nov. 30, 2011 Restricted Stock Units [Member] Minimum [Member] November 2011 and February 2012 Plan [Member]	Nov. 30, 2011 Restricted Stock Units [Member] Maximum [Member] November 2011 and February 2012 Plan [Member]	Jun. 30, 2013 Common Stock Subject to Repurchase [Member]	Jun. 30, 2012 Common Stock Subject to Repurchase [Member]	May 31, 2012 Performance-Based RSU [Member]	Feb. 29, 2012 Performance-Based RSU [Member] milestone	Nov. 30, 2011 Performance-Based RSU [Member]	Jun. 30, 2013 Performance-Based RSU [Member] milestone	May 31, 2009 Performance-Based RSU [Member] May 2009 Plan [Member]	Apr. 30, 2011 Performance-Based RSU [Member] April 2011 Plan [Member]	Feb. 29, 2012 Performance-Based RSU [Member] November 2011 and February 2012 Plan [Member]	May 31, 2013 Performance-Based MSU [Member] Minimum [Member]	May 31, 2013 Performance-Based MSU [Member] Maximum [Member]	May 31, 2013 Performance-Based MSU [Member] First Vesting Period [Member]	May 31, 2013 Performance-Based MSU [Member] Second Vesting Period [Member]	Feb. 29, 2012 Officer [Member] Performance-Based RSU [Member]	Jun. 30, 2013 Veloce Technologies, Inc. [Member]	May 17, 2009 Veloce Technologies, Inc. [Member]	May 31, 2012 First Vesting Period [Member]	May 31, 2012 Second Vesting Period [Member]	Mar. 31, 2013 August 2004 [Member]	Oct. 31, 2008 August 2004 [Member]	Aug. 31, 2004 August 2004 [Member]	Mar. 31, 2013 August 2004 [Member]	Mar. 31, 2013 August 2004 [Member]
Stockholders Equity [Line Items]
Preferred stock, shares authorized for issuance	2,000,000		2,000,000
Preferred stock, shares outstanding	0		0
Common stock, shares authorized for issuance	375,000,000		375,000,000
Common stock, shares issued	70,343,000		67,952,000
Common stock, shares outstanding	70,343,000		67,952,000
Common stock reserved for issuance									4,800,000			6,300,000
Shares available for future issuance											1,800,000				4,200,000	10,900,000
Percentage of purchase price of common stock equal to fair market value									85.00%
Common stock, shares issued, employee stock purchase plan									0	0			1,200,000
Stock repurchase program, authorized amount																																									$ 15,900,000		$ 200,000,000
Increase in the amount authorized for stock purchase program																																										100,000,000
Stock repurchase program, shares repurchased														0																														100,000	17,300,000
Stock repurchase program, weighted average price per share																																												$ 5.18	$ 10.04
Number of stockholder-approved plans			2
Number of plans unapproved by stockholders			4
Options expiration period, in years			10 years
Vesting period, in years																		4 years	4 years	4 years	1 year	18 months			1 year
Vesting and exercisable rate of new hire grants, percentage			25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in First Period of Employment				0
Vesting and exercisable rate of new hire grants, grant date					36 months		48 months
Shares outstanding	3,169,000		3,492,000																				0	0
Weighted average remaining contractual term for options outstanding	3 years 3 months 18 days
Aggregate pretax intrinsic value of options exercised	100,000
Pre-tax intrinsic value of options outstanding	2,400,000
Pre-tax intrinsic value of options exercisable	2,200,000
Common stock, closing price per share	$ 8.80																$ 8.80
Award vesting period, quarters																				12
Term of award																									P12M		18-month		P3Y	P3Y	P18M
Restricted stock units awarded																	1,670,000																			500,000
Number of milestones																										3
Aggregate intrinsic value																																				3,700,000
Number of milestones completed																												2
Award performance period																																		2 years	3 years
Award vesting percentage																																0.00%	150.00%
Award pay out percentage						50.00%		150.00%
Weighted average remaining contractual term for the restricted stock units outstanding, in years	1 year 2 months 12 days
Aggregate pre-tax intrinsic value of restricted stock units outstanding which includes performance based awards which are subject to milestone attainments	56,200,000
Share Based Compensation Arrangement by Share Based Payment Award Equity Other than Options Aggregate Pre Tax Intrinsic Value Released	9,600,000
Number of years of development work to be performed																																						5 years
Stock-based compensation expense related to the acceleration of Veloce warrants	$ 0	$ 1,289,000																																			$ 1,289,000
Award vesting percentage																																							66.67%	33.33%