XML 24 R52.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stockholders' Equity (Stock-Based Compensation Narrative) (Details) (USD $)
 3 Months Ended 12 Months Ended
Mar. 30, 2013
Dec. 29, 2012
Mar. 31, 2012
Dec. 29, 2012
Ascendiant Capital Markets LLC [Member]
Dec. 31, 2011
Ascendiant Capital Markets LLC [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Proceeds from sale of shares   $ 1,300,000 $ 3,573,000 $ 3,900,000 $ 1,900,000
Shares issued during the period   1,685,394   1,312,669 697,470
Number of shares cancelled 11,386   23,631    
Value of shares cancelled 7,500   64,000    
Common stock pursuant to awards, shares authorized 6,605,566        
Automatic annual increase in shares authorized as percentage of common stock outstanding 5.00%        
Shares available for grant 886,822        
Automatic annual increase in shares authorized, subject to adjustment for corporate actions 1,200,000        
Rate of vesting of options granted 25.00%        
Vesting period of options granted, in years 4 years        
Intrinsic value of options exercised during the period 27,088        
Expiration of vested options, period from date of grant 10 years        
Restricted stock vested, fair value on grant date 30,000   200,000    
Unearned stock-based compensation related to unvested common stock options and restricted stock awards $ 3,700,000        
Weighted-average period over which unearned stock-based compensation is expected to be recognized 2 years 8 months 12 days