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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2018
Jan. 31, 2017
Jan. 31, 2016
OPERATING ACTIVITIES      
Net income $ 26,879 $ 23,838 $ 20,562
Adjustments to reconcile net income to cash provided by operating activities:      
Depreciation 4,101 3,628 3,377
Amortization of intangible assets 33,477 30,001 26,222
Stock-based compensation expense (Note 16) 2,807 2,022 1,577
Other non-cash operating activities (784) (1,028) (392)
Deferred tax expense 1,297 3,640 5,765
Deferred tax charge (31) 358 22
Accounts receivable      
Trade (1,963) 2,727 764
Other 16 (212) 203
Prepaid expenses and other (1,772) (64) (86)
Inventory 52 2 314
Accounts payable 1,428 (317) (412)
Accrued liabilities (592) 3,674 25
Income taxes payable 6,326 1,431 (1,690)
Deferred revenue 902 2,883 (2,008)
Cash provided by operating activities 72,143 72,583 54,243
INVESTING ACTIVITIES      
Purchase of marketable securities (241) (4,667)
Sale of marketable securities 6,140
Additions to property and equipment (5,086) (4,914) (4,309)
Acquisition of subsidiaries, net of cash acquired (Note 3) (111,867) (71,348) (120,853)
Cash used in investing activities (116,953) (70,363) (129,829)
FINANCING ACTIVITIES      
Proceeds from borrowing on the credit facility 80,000 10,801
Credit facility repayments (43,000) (10,200)
Payment of debt issuance costs (957)
Issuance of common shares for cash, net of issuance costs 1,003 145 158
Settlement of stock options (Note 16) (2,590)
Cash provided by (used in) financing activities 38,003 (211) (2,432)
Effect of foreign exchange rate changes on cash 3,817 (1,087) (2,822)
(Decrease) increase in cash (2,990) 922 (80,840)
Cash, beginning of year 38,135 37,213 118,053
Cash, end of year 35,145 38,135 37,213
Supplemental disclosure of cash flow information:      
Cash paid during the year for interest 680 64 31
Cash paid during the year for income taxes $ 3,887 $ 3,861 $ 3,533