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Share-Based Compensation (Details Textual) (USD $)
 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jul. 28, 2012
Jan. 31, 2012
Jul. 28, 2012
Employee Stock Purchase Plan [Member]
Jul. 30, 2011
Employee Stock Purchase Plan [Member]
Jul. 28, 2012
Employee Stock Purchase Plan [Member]
Jul. 30, 2011
Employee Stock Purchase Plan [Member]
Jul. 28, 2012
Non-employee director [Member]
Jul. 28, 2012
Equity incentive plan [Member]
Jul. 28, 2012
Equity incentive plan [Member]
Jul. 28, 2012
Restricted Stock Units (RSUs) [Member]
Jul. 28, 2012
Stock Option [Member]
Apr. 30, 2012
First quarter [Member]
Jul. 28, 2012
First quarter [Member]
Jul. 28, 2012
Second quarter [Member]
Jul. 28, 2012
Second quarter [Member]
Jul. 28, 2012
First anniversary [Member]
Restricted Stock Units (RSUs) [Member]
Jul. 28, 2012
Second anniversary [Member]
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation (Textual) [Abstract]                                  
Number of shares granted to non director employee directors               20,000 5,000 9,900              
Plan provides for an automatic annual grant                 10 years                
Option granted to employee vested over years                 4 years                
Aggregate shares authorized for awards under the Plan               1,000,000 1,000,000                
Shares available for grant under the Plan               559,594 559,594                
Non-employee director is entitled to an annual cash retainer             $ 7,000                    
Non-employee director is entitled to an annual cash retainer additional             500                    
Options granted weighted average fair value per share                       $ 2.03 $ 2.09 $ 2.05 $ 2.01    
Unrecognized compensation expense related to unvested options                   252,952 285,920            
Available shares under employee stock purchase plan 94,000       247,500                        
Shares purchase under Employee Stock Purchase Plan 42,438   1,550 1,559 2,547 3,277                      
Available shares under Stock Purchase Plan 899,603 888,097 67,660   67,660                        
Non-employee director received restricted stock award value             $ 20,000                    
Equity retainer vested, period             12 months                    
Restricted stock unit vested percentage                               50.00% 50.00%
Share-Based Compensation (Additional Textual) [Abstract]                                  
Employee purchase plan discount rate 15.00%