Summary of Significant Accounting Policies (Tables)
3 Months Ended
Apr. 30, 2018
Accounting Policies [Abstract]  
RSUs, PSUs and stock options granted during the period
The following table sets forth the restricted stock unit awards ("RSUs"), performance stock awards ("PSUs") and stock options granted during the three months ended April 30, 2018 and 2017: 


 
Three Months Ended 
 April 30,
 
 
2018
 
2017
 
RSUs (1)
80,411

 
324,487

 
PSUs (2)

 
429,000

 
Stock Options (3)
620,166

 

 
Total stock awards granted
700,577

 
753,487

 
 
 
 
 
 
Aggregate grant date fair value (in thousands)
$
15,511

 
$
7,761

 
(1) The RSUs issued during the three months ended April 30, 2018 and 2017 are scheduled to vest ratably over periods of three to four years from the date of grant.
(2) The PSUs issued during the three months ended April 30, 2017 will vest, if at all, upon the certification, after fiscal year 2020, by the compensation committee of the satisfaction of the annual and cumulative Earnings Before Interest, Taxes, Depreciation and Amortization performance conditions over the three fiscal years commencing with fiscal year 2018.
(3) The weighted-average assumptions for the option awards granted during the three months ended April 30, 2018 included expected volatility of 68.0%, an expected term of 6.5 years and risk-free interest rate of 2.67%No dividend yield was included in the weighted-average assumptions for the option awards granted during the three months ended April 30, 2018.
Shares outstanding for the earnings per share calculations
Earnings per Share. Basic earnings per share is calculated by dividing net income (loss) by the weighted-average number of common shares outstanding during the period. Diluted earnings per share includes the dilutive effects of any stock options and restricted stock units granted, which is calculated using the treasury-stock method. The following table sets forth the shares outstanding for the earnings per share calculations: 
 
Three Months Ended 
 April 30,
 
2018
 
2017
Weighted-average common shares outstanding - Basic
31,540,684

 
30,972,312

Dilutive effect of stock options, RSUs and PSUs
912,180

 

Weighted-average common shares outstanding - Diluted
32,452,864

 
30,972,312

Cumulative effect of the changes for adoption of Topic 606
The cumulative effect of the changes made to the Company’s Condensed Consolidated Balance Sheet as a result of the adoption of ASC 606 were as follows (in thousands):
 
Impact of Adoption of ASC 606
(in thousands)
Balance at January 31, 2018
Adjustments due to ASC 606
Balance at February 1, 2018
Assets
 
 
 
   Other Accounts Receivable
$
71,186

$
1,210

$
72,396

   Deferred Income Taxes
21,565

(254
)
21,311

Stockholder's Equity
$
535,068

$
956

$
536,024