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Consolidated Statement of Shareholders' Equity - 6 months ended Jul. 30, 2016 - USD ($)
$ in Thousands
Total
Common stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Accumulated deficit [Member]
Balance at Jan. 30, 2016 $ 244,481 $ 546   $ 306,522 $ (62,587)
Balance, common stock, shares at Jan. 30, 2016 54,590,641 54,590,641      
Share-based compensation expense $ 5,864     5,864 0
Issuance of unrestricted stock awards (in shares)   3,047      
Issuance of unrestricted stock awards $ 140 $ 0   140 0
Exercise of options to purchase common stock (in shares) 196,281 196,281      
Exercise of options to purchase common stock $ 2,612 $ 2   2,610 0
Vesting of restricted and performance-based stock units (in shares)   116,812      
Common shares withheld for taxes (in shares)     (44,337)    
Common shares withheld for taxes (1,808)     (1,808)  
Excess tax benefit related to exercises of stock options 1,710     1,710  
Net income 16,605       16,605
Balance at Jul. 30, 2016 $ 269,697 $ 548   315,131 $ (45,982)
Balance, common stock, shares at Jul. 30, 2016 54,864,418.000      
Stock Issued During Period, Shares, Employee Stock Purchase Plans   1,974      
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs $ 93     $ 93