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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Jan. 31, 2020
REVENUES $ 424,690 $ 348,664 $ 325,791
COST OF REVENUES 101,810 89,910 85,721
GROSS MARGIN 322,880 258,754 240,070
EXPENSES      
Sales and marketing 46,895 38,785 40,389
Research and development 62,570 54,066 53,513
General and administrative 44,454 36,267 34,628
Other charges (Note 20) 6,428 2,335 3,797
Amortization of intangible assets 59,099 55,905 55,485
Operating Expenses, Total 219,446 187,358 187,812
INCOME FROM OPERATIONS 103,434 71,396 52,258
INTEREST EXPENSE (1,123) (1,186) (4,416)
INVESTMENT INCOME 299 159 193
INCOME BEFORE INCOME TAXES 102,610 70,369 48,035
INCOME TAX EXPENSE (Note 18)      
Current 14,814 3,746 5,295
Deferred 1,514 14,523 5,743
Income Tax Expense (Benefit), Total 16,328 18,269 11,038
NET INCOME $ 86,282 $ 52,100 $ 36,997
EARNINGS PER SHARE (Note 16)      
Basic (in dollars per share) $ 1.02 $ 0.62 $ 0.45
Diluted (in dollars per share) $ 1.00 $ 0.61 $ 0.45
WEIGHTED AVERAGE SHARES OUTSTANDING (thousands)      
Basic (in shares) 84,591 84,360 81,659
Diluted (in shares) 86,200 85,756 82,867