Share-Based Compensation (Tables)

6 Months Ended

Dec. 28, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Total share-based compensation expense was as follows (in thousands):



	Three Months Ended				Six Months Ended
	December 28, 2012		December 30, 2011		December 28, 2012		December 30, 2011
Cost of revenue	$	371	$	385	$	871	$	667
Research and development	588		507		1,127		1,022
Sales and marketing	423		439		809		800
General and administrative	1,114		909		2,200		1,820
Total share-based compensation expense	$	2,496	$	2,240	$	5,007	$	4,309

Weighted-average assumptions used in calculation of fair value of certain share-based awards

The fair value of share-based awards was estimated using the Black-Scholes option-pricing model with the following weighted-average assumptions for the following periods:



	Three Months Ended						Six Months Ended
	December 28, 2012			December 30, 2011			December 28, 2012			December 30, 2011
Option Plans Shares
Risk-free interest rate	0.7		%	0.8		%	0.7		%	1.1		%
Volatility	67.6		%	65.0		%	67.6		%	74.3		%
Weighted average expected life (in years)	5.00			4.46			5.00			4.64
Expected dividend yield	—			—			—			—
Weighted average fair value	$	3.67		$	6.15		$	3.67		$	8.34

ESPP Plan shares
Risk-free interest rate	0.2		%	0.1		%	0.2		%	0.1		%
Volatility	83.0		%	80.0		%	83.0		%	80.0		%
Weighted average expected life (in years)	1.25			1.25			1.25			1.25
Expected dividend yield	—			—			—			—
Weighted average fair value	$	4.39		$	6.43		$	4.39		$	6.43

Summary of stock option activity

A summary of stock option activity for the six months ended December 28, 2012 was as follows:



	Options Outstanding
	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual term in years	Aggregate Intrinsic Value
						(in thousands)
Balance at June 29, 2012	3,703,660		$	10.79
Options granted	64,000		6.62
Options exercised	(144,190	)	5.36
Options cancelled	(207,754	)	12.36
Balance at December 28, 2012	3,415,716		$	10.84	5.28	$	4,787
Vested and expected to vest at December 28, 2012	3,237,345		$	10.88	5.08	$	4,498
Exercisable at December 28, 2012	2,365,234		$	11.28	3.79	$	3,146

Summary of RSA activity

The following table summarizes the Company's activity with respect to restricted stock units (“RSUs”) for the six months ended December 28, 2012:



	Number of Shares
Balance at June 29, 2012	918,764
Awarded	785,489
Released	(131,942	)
Forfeited	(112,001	)
Balance at December 28, 2012	1,460,310
Vested and expected to vest at December 28, 2012	1,110,747

Summary of number and value of shares netted for employee taxes

The number and the value of the shares withheld for tax purposes are summarized in the table below (in thousands except share amounts):



	Three Months Ended				Six Months Ended
	December 28, 2012		December 30, 2011		December 28, 2012		December 30, 2011
RSUs shares withheld for taxes	22,764		27,665		47,145		57,031
RSUs amounts withheld for taxes	$	188	$	397	$	375	$	818

Shares issued and weighted-average purchase price for Employee Stock Purchase Plan

The following table shows the shares issued and their respective weighted-average purchase price per share, pursuant to the ESPP, during the three and six months ended December 28, 2012 and December 30, 2011. As of December 28, 2012, the ESPP was offered primarily to employees located in the U.S. During the Company's next offering period, which will begin in February 2013, the Company will be offering this benefit to employees in various international locations.



	December 28, 2012		December 30, 2011
Shares issued	256,972		259,347
Weighted-average purchase price per share	$	6.76	$	5.99