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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Jan. 31, 2023
Jan. 31, 2022
Jan. 31, 2021
CONSOLIDATED STATEMENTS OF OPERATIONS      
REVENUES $ 486,014 $ 424,690 $ 348,664
COST OF REVENUES 113,326 101,810 89,910
GROSS MARGIN 372,688 322,880 258,754
EXPENSES      
Sales and marketing 56,573 46,895 38,785
Research and development 70,353 62,570 54,066
General and administrative 49,710 44,454 36,267
Other charges 5,441 6,428 2,335
Amortization of intangible assets 60,177 59,099 55,905
TOTAL EXPENSES 242,254 219,446 187,358
INCOME FROM OPERATIONS 130,434 103,434 71,396
INTEREST EXPENSE (1,167) (1,123) (1,186)
INVESTMENT AND OTHER INCOME 4,461 299 159
INCOME BEFORE INCOME TAXES 133,728 102,610 70,369
INCOME TAX EXPENSE      
Current 28,248 14,814 3,746
Deferred 3,244 1,514 14,523
TOTAL INCOME TAX EXPENSE 31,492 16,328 18,269
NET INCOME $ 102,236 $ 86,282 $ 52,100
EARNINGS PER SHARE      
Basic $ 1.21 $ 1.02 $ 0.62
Diluted $ 1.18 $ 1.00 $ 0.61
WEIGHTED AVERAGE SHARES OUTSTANDING (thousands)      
Basic 84,791 84,591 84,360
Diluted 86,451 86,200 85,756