Share-Based Compensation (Tables)

3 Months Ended

Sep. 28, 2012

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

Total share-based compensation expense

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

	Three Months Ended
	September 28, 2012		September 30, 2011
Cost of revenue	$	500	$	282
Research and development	539		515
Sales and marketing	386		361
General and administrative	1,086		911
Total share-based compensation expense	$	2,511	$	2,069

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
	September 28, 2012			September 30, 2011
Option Plans Shares
Risk-free interest rate	0.7		%	1.1		%
Volatility	67.6		%	75.6		%
Weighted average expected life (in years)	5.00			4.66
Expected dividend yield	—			—
Weighted average fair value	$	3.67		$	8.66
ESPP Plan shares
Risk-free interest rate	0.2		%	0.1		%
Volatility	83.0		%	80.0		%
Weighted average expected life (in years)	1.25			1.25
Expected dividend yield	—			—
Weighted average fair value	$	4.39		$	6.43

Summary of stock option activity

A summary of stock option activity for the three months ended September 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	(105,073	)	5.33
Options cancelled	(109,784	)	11.63
Balance at September 28, 2012	3,552,803		$	10.85	5.44	$	3,657
Vested and expected to vest at September 28, 2012	3,324,688		$	10.90	5.20	$	3,399
Exercisable at September 28, 2012	2,280,623		$	11.41	3.55	$	2,205

Summary of RSA activity

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

	Number of Shares
Balance at June 29, 2012	918,764
Awarded	774,489
Released	(65,035	)
Forfeited	(88,844	)
Balance at September 28, 2012	1,539,374
Vested and expected to vest at September 28, 2012	1,124,163

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
	September 28, 2012		September 30, 2011
RSUs shares withheld for taxes	24,381		29,366
RSUs amounts withheld for taxes	$	188	$	420

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 months ended September 28, 2012 and September 30, 2011.

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