Share-Based Compensation (Details) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended	6 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended		5 Months Ended	3 Months Ended		6 Months Ended		1 Months Ended		3 Months Ended		6 Months Ended		0 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Dec. 28, 2012	Dec. 30, 2011	Dec. 28, 2012	Dec. 30, 2011	Dec. 28, 2012 Stock options	Dec. 28, 2012 Stock options	Dec. 30, 2011 Stock options	Dec. 28, 2012 Restricted stock units (RSUs)	Dec. 28, 2012 Restricted stock units (RSUs)	Dec. 30, 2011 Restricted stock units (RSUs)	Dec. 28, 2012 Restricted stock units (RSUs)	Dec. 30, 2011 Restricted stock units (RSUs)	Dec. 28, 2012 Executive PSUs	Dec. 28, 2012 Option Plan	Dec. 30, 2011 Option Plan	Dec. 28, 2012 Option Plan	Dec. 30, 2011 Option Plan	Aug. 31, 2012 Equity Incentive Plan - 2005 Restricted stock units (RSUs) Executive	Aug. 31, 2012 Equity Incentive Plan - 2005 Executive PSUs Executive Intstallment	Dec. 28, 2012 Employee Stock Purchase Plan - 2005	Dec. 30, 2011 Employee Stock Purchase Plan - 2005	Dec. 28, 2012 Employee Stock Purchase Plan - 2005	Dec. 30, 2011 Employee Stock Purchase Plan - 2005	Dec. 28, 2012 Employee Stock Purchase Plan - 2005 Employee Stock	Dec. 28, 2012 Cost of revenue	Dec. 30, 2011 Cost of revenue	Dec. 28, 2012 Cost of revenue	Dec. 30, 2011 Cost of revenue	Dec. 28, 2012 Research and development	Dec. 30, 2011 Research and development	Dec. 28, 2012 Research and development	Dec. 30, 2011 Research and development	Dec. 28, 2012 Sales and marketing	Dec. 30, 2011 Sales and marketing	Dec. 28, 2012 Sales and marketing	Dec. 30, 2011 Sales and marketing	Dec. 28, 2012 General and administrative	Dec. 30, 2011 General and administrative	Dec. 28, 2012 General and administrative	Dec. 30, 2011 General and administrative
Share-based compensation:
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																		4 years
Share-based compensation expense	$ 2,496,000	$ 2,240,000	$ 5,007,000	$ 4,309,000																					$ 371,000	$ 385,000	$ 871,000	$ 667,000	$ 588,000	$ 507,000	$ 1,127,000	$ 1,022,000	$ 423,000	$ 439,000	$ 809,000	$ 800,000	$ 1,114,000	$ 909,000	$ 2,200,000	$ 1,820,000
Weighted average fair value assumptions:
Risk-free interest rate														0.70%	0.80%	0.70%	1.10%			0.20%	0.10%	0.20%	0.10%
Volatility														67.60%	65.00%	67.60%	74.30%			83.00%	80.00%	83.00%	80.00%
Weighted average expected life														5 years	4 years 5 months 16 days	5 years	4 years 7 months 21 days			1 year 3 months	1 year 3 months	1 year 3 months	1 year 3 months
Expected dividend yield														0.00%	0.00%	0.00%	0.00%			0.00%	0.00%	0.00%	0.00%
Weighted average fair value (USD per share)														$ 3.67	$ 6.15	$ 3,670.00	$ 8,340.00			$ 4.39	$ 6.43	$ 4,390.00	$ 6,430.00
Options outstanding, shares:
Options outstanding, beginning of period (in shares)			3,703,660
Options granted (in shares)			64,000
Options exercised (in shares)			(144,190)
Options cancelled (in shares)			(207,754)
Options outstanding, end of period (in shares)	3,415,716		3,415,716
Vested and expected to vest (in shares)	3,237,345		3,237,345
Exercisable (in shares)	2,365,234		2,365,234
Options outstanding, weighted average exercise price:
Options outstanding, beginning balance, weighted average exercise price (USD per share)			$ 10.79
Options granted, weighted average exercise price (USD per share)			$ 6.62
Options exercised, weighted average exercise price (USD per shares)			$ 5.36
Options cancelled, weighted average exercise price (USD per share)			$ 12.36
Options outstanding, ending balance, weighted average exercise price (USD per share)	$ 10.84		$ 10.84
Vested and expected to vest, weighted average exercise price (USD per share)	$ 10.88		$ 10.88
Exercisable, weighted average exercise price (USD per share)	$ 11.28		$ 11.28
Options outstanding, weighted average remaining contractual term			5 years 3 months 11 days
Vested and expected to vest, weighted average remaining contractual term			5 years 0 months 29 days
Exercisable, weighted average remaining contractual term			3 years 9 months 15 days
Options outstanding, aggregate intrinsic value	4,787,000		4,787,000
Vested and expected to vest, aggregate intrinsic value	4,498,000		4,498,000
Exercisable, aggregate intrinsic value	3,146,000		3,146,000
Total intrinsic value of options exercised in period						400,000	900,000
Total fair value of shares vested during period						2,100,000	1,400,000
Total unrecognized compensation cost related to non-vested awards, options					2,300,000	2,300,000
Total compensation cost related to non-vested awards, period for recognition					1 year 2 months 16 days			2 years 11 months 3 days
Restricted stock activity, number of shares:
Equity instruments other than options, outstanding, beginning of period (in shares)											918,764
Equity instruments other than options, awarded (in shares)											785,489		231,000
Equity instruments other than options, released (in shares)											(131,942)
Equity instruments other than options, forfeited (in shares)											(112,001)
Equity instruments other than options, outstanding, end of period (in shares)								1,460,310	1,460,310		1,460,310
Equity instruments other than options, vested and expected to vest (in shares)								1,110,747	1,110,747		1,110,747
Initial vesting percentage																		25.00%	25.00%
Duration of annual vesting																		1 year
Quarterly vesting percentage																		6.25%
Remaining vesting percentage																			75.00%
Number of annual vesting installments																			3
Shares withheld for taxes									22,764	27,665	47,145,000	57,031,000
Amounts withheld for taxes			379,000	799,000					188,000	397,000	375,000	818,000
Total unrecognized compensation cost related to non-vested awards, equity instruments other than options								$ 8,200,000	$ 8,200,000		$ 8,200,000													$ 1,600,000
Equity instruments other than options, vested and expected to vest, weighted average remaining contractual term																								1 year 7 months 12 days
Employee Stock Purchase Plan:
Shares issued (in shares)			256,972	259,347
Weighted-average purchase price per share (USD per share)			$ 6.76	$ 5.99