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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2018
REVENUES $ 325,791 $ 275,171 $ 237,439
COST OF REVENUES 85,721 74,994 63,704
GROSS MARGIN 240,070 200,177 173,735
EXPENSES      
Sales and marketing 40,389 36,873 33,128
Research and development 53,513 47,872 41,804
General and administrative 34,628 30,012 25,448
Other charges (Note 20) 3,797 3,798 3,994
Amortization of intangible assets 55,485 40,179 33,477
187,812 158,734 137,851
INCOME FROM OPERATIONS 52,258 41,443 35,884
INTEREST EXPENSE (4,416) (2,128) (1,297)
INVESTMENT INCOME 193 195 161
INCOME BEFORE INCOME TAXES 48,033 39,510 34,748
INCOME TAX EXPENSE (Note 18)      
Current 5,295 6,042 6,572
Deferred 5,743 2,191 1,297
11,038 8,233 7,869
NET INCOME $ 36,997 $ 31,277 $ 26,879
Earnings per share      
Basic (in dollars per share) $ 0.45 $ 0.41 $ 0.35
Diluted (in dollars per share) $ 0.45 $ 0.40 $ 0.35
WEIGHTED AVERAGE SHARES OUTSTANDING (thousands)      
Basic (in shares) 81,659 76,832 76,324
Diluted (in shares) 82,867 77,791 77,112