XML 75 R61.htm IDEA: XBRL DOCUMENT v3.8.0.1
Summary of Stock Option Activity (Detail) - Stock Options - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Awards outstanding at beginning of year, Shares 908,250  
Granted, Shares 160,000  
Forfeited or Expired, Shares (168,250)  
Awards outstanding at end of year, Shares 900,000 908,250
Awards outstanding fully vested and expected to vest, Shares 900,000  
Awards exercisable at end of year, Shares 740,000  
Awards outstanding at beginning of year, Weighted Average Exercise Price $ 34.45  
Granted, Weighted Average Exercise Price 18.89  
Forfeited or Expired, Weighted Average Exercise Price 32.74  
Awards outstanding at end of year, Weighted Average Exercise Price 32.01 $ 34.45
Awards outstanding fully vested and expected to vest, Weighted Average Exercise Price 32.01  
Awards exercisable at end of year, Weighted Average Exercise Price $ 34.84  
Awards outstanding at end of year, Weighted Average Remaining Contractual Term (years) 3 years 4 months 24 days 3 years 1 month 6 days
Awards outstanding fully vested and expected to vest, Weighted Average Remaining Contractual Term (years) 3 years 4 months 24 days  
Awards exercisable at end of year, Weighted Average Remaining Contractual Term (years) 2 years 8 months 12 days  
Awards outstanding, Aggregate Intrinsic Value $ 3,933 $ 75
Awards outstanding fully vested and expected to vest, Aggregate Intrinsic Value 3,933  
Awards exercisable at end of year, Aggregate Intrinsic Value $ 1,498