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Consolidated Statements of Changes in Convertible Preferred Stock and Shareholders' Equity (Deficit) (USD $)
Total
Series A 8% Convertible Preferred Stock [Member]
Common stock [Member]
Additional paid- in capital [Member]
Accumulated deficit [Member]
Balance at Jan. 29, 2011 $ (148,797,000) $ 191,855,000 $ 161,000 $ 732,000 $ (149,690,000)
Balance, common stock, shares at Jan. 29, 2011     16,084,358    
Balance, preferred stock, shares at Jan. 29, 2011   89,291,773      
Issuance of warrants to purchase common stock to professional service providers 31,000     31,000  
Stock-based compensation expense 1,197,000     1,197,000  
Exercise of options and warrants to purchase common stock 33,000     33,000  
Exercise of options and warrants to purchase common stock (in shares)     5,191    
Vesting of restricted shares related to stock option exercises 491,000     491,000  
Repurchase of unvested restricted shares related to stock option exercises 98,000     98,000  
Issuance of common stock 1,110,000   1,000 1,109,000  
Issuance of common stock (in shares)     159,248    
Net income 16,078,000       16,078,000
Balance at Jan. 28, 2012 (129,759,000) 191,855,000 162,000 3,691,000 (133,612,000)
Balance, common stock, shares at Jan. 28, 2012     16,248,797.000    
Balance, preferred stock, shares at Jan. 28, 2012   89,291,773.000      
Issuance of warrants to purchase common stock to professional service providers 43,000     43,000  
Stock-based compensation expense 12,142,000   20,000 12,122,000  
Stock-based compensation expense (in shares)     2,027,678    
Exercise of options and warrants to purchase common stock 239,000   1,000 238,000  
Exercise of options and warrants to purchase common stock (in shares)     31,898    
Vesting of restricted shares related to stock option exercises 802,000     802,000  
Repurchase of unvested restricted shares related to stock option exercises 3,000     3,000  
Repurchase of unvested restricted shares related to stock option exercises (in shares)     (30,221)    
Conversion of preferred stock 191,855,000 (191,855,000) 309,000 191,546,000  
Conversion of preferred stock (in shares)   (89,291,773) (30,894,953)    
Issuance of common stock 73,198,000   48,000 73,150,000  
Issuance of common stock (in shares)   4,807,692      
Dividend paid to shareholders (99,451,000)     (12,605,000) (86,846,000)
Excess tax benefit 1,647,000     1,647,000  
Net income 20,025,000       20,025,000
Balance at Feb. 02, 2013 70,744,000   540,000 270,637,000 (200,433,000)
Balance, common stock, shares at Feb. 02, 2013 53,980,797   53,980,797.000    
Stock-based compensation expense 9,854,000     9,854,000  
Stock-based compensation expense (in shares)     10,069    
Exercise of options and warrants to purchase common stock 1,484,000   2,000 1,482,000  
Exercise of options and warrants to purchase common stock (in shares)     196,941    
Vesting of restricted shares related to stock option exercises 239,000     239,000  
Repurchase of unvested restricted shares related to stock option exercises (in shares)     (648)    
Issuance of common stock 148,000   0 148,000  
Issuance of common stock (in shares)     3,565    
Excess tax benefit 2,262,000     2,262,000  
Net income 32,142,000       32,142,000
Balance at Feb. 01, 2014 $ 116,873,000   $ 542,000 $ 284,622,000 $ (168,291,000)
Balance, common stock, shares at Feb. 01, 2014 54,190,724   54,190,724.000