XML 29 R18.htm IDEA: XBRL DOCUMENT v3.7.0.1
Loss or Earnings Per Share - Additional Information (Detail) - shares
3 Months Ended
Apr. 29, 2017
Apr. 30, 2016
Earnings Per Share [Abstract]    
Stock options and restricted stock units not included in the computation of diluted earnings per share 1,400,000 476,000