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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2017
Jan. 31, 2016
Jan. 31, 2015
OPERATING ACTIVITIES      
Net income $ 23,838 $ 20,562 $ 15,059
Adjustments to reconcile net income to cash provided by operating activities:      
Depreciation 3,628 3,377 3,295
Amortization of intangible assets 30,001 26,222 21,715
Stock-based compensation expense (Note 16) 2,022 1,577 1,543
Other non-cash operating activities (1,028) (392)
Deferred tax expense 3,640 5,765 3,978
Deferred tax charge 358 22
Accounts receivable      
Trade 2,727 764 3,999
Other (212) 203 4,869
Prepaid expenses and other (64) (86) 141
Inventory 2 314 859
Accounts payable (317) (412) (3,121)
Accrued liabilities 3,674 25 (294)
Income taxes payable 1,431 (1,690) (73)
Deferred revenue 2,883 (2,008) (2,492)
Cash provided by operating activities 72,583 54,243 49,478
INVESTING ACTIVITIES      
Purchase of marketable securities (241) (4,667)
Sale of marketable securities 6,140
Additions to property and equipment (4,914) (4,309) (2,679)
Acquisition of subsidiaries, net of cash acquired and bank indebtedness assumed (Note 3) (71,348) (120,853) (82,152)
Cash used in investing activities (70,363) (129,829) (84,831)
FINANCING ACTIVITIES      
Proceeds from borrowing on the credit facility 10,801 20,000
Credit facility repayments (10,200) (63,305)
Payment of debt issuance costs (957) (386)
Issuance of common shares for cash, net of issuance costs 145 158 140,724
Settlement of stock options (Note 16) (2,590) (405)
Cash (used in) provided by financing activities (211) (2,432) 96,628
Effect of foreign exchange rate changes on cash (1,087) (2,822) (5,927)
Increase (decrease) in cash 922 (80,840) 55,348
Cash, beginning of year 37,213 118,053 62,705
Cash, end of year 38,135 37,213 118,053
Supplemental disclosure of cash flow information:      
Cash paid during the year for interest 64 31 692
Cash paid during the year for income taxes $ 3,861 $ 3,533 $ 2,983