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Stock-Based Compensation (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended 0 Months Ended 3 Months Ended
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Mar. 30, 2013
Aug. 17, 2001
2001 Stock Option Plan [Member]
Aug. 17, 2007
2001 Stock Option Plan [Member]
Expiration From Grant Date [Member]
Aug. 17, 2001
2001 Stock Option Plan [Member]
Expiration From Grant Date [Member]
Aug. 17, 2007
2001 Stock Option Plan [Member]
Expiration From Termination Of Service [Member]
Aug. 17, 2001
2001 Stock Option Plan [Member]
Expiration From Termination Of Service [Member]
Sep. 28, 2013
2009 Equity Incentive Plan [Member]
Aug. 14, 2009
2009 Equity Incentive Plan [Member]
Aug. 14, 2009
2009 Equity Incentive Plan [Member]
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                          
Stock-based compensation $ 705 $ 769 $ 1,348 $ 1,514                  
Options granted, estimated total grant date fair value 1,843 238 4,041 238                  
Unrecorded stock-based compensation related to stock options 5,572   5,572                    
Unrecognized stock-based compensation amortization period 2 years 2 months 12 days                        
Shares reserved for issuance           2,000,000           1,000,000 1,599,909
Options exercisable period           1 year              
Expriation period             10 years 7 years 30 days 30 days 10 years    
Vesting period           5 years         5 years    
Number of shares available for grant 485,551   485,551   797,151             159,509  
Prior forfeited shares available for grant                       1,440,400  
Percentage of options to vest on each of the first five anniversaries 20.00%                        
Weighted average fair value per share $ 10.44   $ 10.01                    
Intrinsic value 173   186                    
Proceeds from stock options exercised 815   1,086                    
Intrinsic value of options outstanding 5,352   5,352                    
Intrinsic value of options exercisable 1,936   1,936                    
Percentage of salary allowable to purchase shares for ESPP 20.00%   20.00%                    
Purchase price percentage for ESPP 95.00%   95.00%                    
Shares allowable for purchase during offering period of ESPP 500   500                    
Proceeds from ESPP     $ 40 $ 63