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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
REVENUES $ 184,993 $ 170,860 $ 151,294
COST OF REVENUES 53,859 54,879 49,043
GROSS MARGIN 131,134 115,981 102,251
EXPENSES      
Sales and marketing 22,424 20,404 16,681
Research and development 31,293 28,077 25,881
General and administrative 21,607 20,333 20,509
Other charges (Note 19) 1,491 2,876 6,512
Amortization of intangible assets 26,222 21,715 17,999
103,037 93,405 87,582
INCOME FROM OPERATIONS 28,097 22,576 14,669
INTEREST EXPENSE (522) (1,088) (993)
INTEREST INCOME 195 333 57
INCOME BEFORE INCOME TAXES 27,770 21,821 13,733
INCOME TAX EXPENSE (Note 17)      
Current 1,443 2,784 1,768
Deferred 5,765 3,978 2,353
7,208 6,762 4,121
NET INCOME $ 20,562 $ 15,059 $ 9,612
EARNINGS PER SHARE (Note 15)      
Basic (in Dollars per share) $ 0.27 $ 0.21 $ 0.15
Diluted (in Dollars per share) $ 0.27 $ 0.21 $ 0.15
WEIGHTED AVERAGE SHARES OUTSTANDING (thousands)      
Basic (in Shares) 75,595 70,559 62,841
Diluted (in Shares) 76,409 71,584 64,370