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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2019
REVENUES $ 348,664 $ 325,791 $ 275,171
COST OF REVENUES 89,910 85,721 74,994
GROSS MARGIN 258,754 240,070 200,177
EXPENSES      
Sales and marketing 38,785 40,389 36,873
Research and development 54,066 53,513 47,872
General and administrative 36,267 34,628 30,012
Other charges (Note 20) 2,335 3,797 3,798
Amortization of intangible assets 55,905 55,485 40,179
Operating Expenses, Total 187,358 187,812 158,734
INCOME FROM OPERATIONS 71,396 52,258 41,443
INTEREST EXPENSE (1,186) (4,416) (2,128)
INVESTMENT INCOME 159 193 195
INCOME BEFORE INCOME TAXES 70,369 48,033 39,510
INCOME TAX EXPENSE (Note 18)      
Current 3,746 5,295 6,042
Deferred 14,523 5,743 2,191
Income Tax Expense (Benefit), Total 18,269 11,038 8,233
NET INCOME $ 52,100 $ 36,997 $ 31,277
Earnings per share      
Basic (in dollars per share) $ 0.62 $ 0.45 $ 0.41
Diluted (in dollars per share) $ 0.61 $ 0.45 $ 0.40
WEIGHTED AVERAGE SHARES OUTSTANDING (thousands)      
Basic (in shares) 84,360 81,659 76,832
Diluted (in shares) 85,756 82,867 77,791