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Shareholders' Equity - Summary of Stock Option Activity and Related Information for Stock Options Granted, Options Outstanding and Exercisable (Details) - May. 02, 2015 - Stock Options - $ / shares
Total
2010 Stock Plan  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 242,667
Options outstanding - exercise price (in dollars per share) $ 24.49
Options exercisable (in shares) 14,667
Options exercisable - exercise price (in dollars per share) $ 14.88
2010 Stock Plan | Exercise Price 1  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 5,333
Options outstanding - exercise price (in dollars per share) $ 10.70
Options outstanding - avg remaining life 6 years 3 months 13 days
Options exercisable (in shares) 5,333
Options exercisable - exercise price (in dollars per share) $ 10.70
Options exercisable - avg. remaining life 6 years 3 months 13 days
2010 Stock Plan | Exercise Price 2  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 40,000
Options outstanding - exercise price (in dollars per share) $ 8.64
Options outstanding - avg remaining life 7 years 3 months 8 days
Options exercisable (in shares) 9,334
Options exercisable - exercise price (in dollars per share) $ 17.27
Options exercisable - avg. remaining life 8 years 3 months 12 days
2010 Stock Plan | Exercise Price 3  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 89,334
Options outstanding - exercise price (in dollars per share) $ 17.27
Options outstanding - avg remaining life 8 years 3 months 12 days
2010 Stock Plan | Exercise Price 4  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 108,000
Options outstanding - exercise price (in dollars per share) $ 37.01
Options outstanding - avg remaining life 9 years 3 months 24 days
2007 Stock Plan  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 108,000
Options outstanding - exercise price (in dollars per share) $ 24.21
Options exercisable (in shares) 15,000
Options exercisable - exercise price (in dollars per share) $ 8.92
2007 Stock Plan | Exercise Price 1  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 5,000
Options outstanding - exercise price (in dollars per share) $ 10.55
Options outstanding - avg remaining life 5 years 3 months 9 days
Options exercisable (in shares) 5,000
Options exercisable - exercise price (in dollars per share) $ 10.55
Options exercisable - avg. remaining life 5 years 3 months 9 days
2007 Stock Plan | Exercise Price 2  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 10,000
Options outstanding - exercise price (in dollars per share) $ 8.10
Options outstanding - avg remaining life 6 years 5 months 17 days
Options exercisable (in shares) 10,000
Options exercisable - exercise price (in dollars per share) $ 8.10
Options exercisable - avg. remaining life 6 years 5 months 17 days
2007 Stock Plan | Exercise Price 3  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 14,167
Options outstanding - exercise price (in dollars per share) $ 8.64
Options outstanding - avg remaining life 7 years 3 months 8 days
2007 Stock Plan | Exercise Price 4  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 28,333
Options outstanding - exercise price (in dollars per share) $ 17.27
Options outstanding - avg remaining life 8 years 3 months 12 days
2007 Stock Plan | Exercise Price 5  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Options outstanding (in shares) 50,500
Options outstanding - exercise price (in dollars per share) $ 37.01
Options outstanding - avg remaining life 9 years 3 months 24 days