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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2014
OPERATING ACTIVITIES      
Net income $ 20,562 $ 15,059 $ 9,612
Adjustments to reconcile net income to cash provided by operating activities:      
Depreciation 3,377 3,295 3,396
Amortization of intangible assets 26,222 21,715 17,999
Stock-based compensation expense (Note 16) 1,577 1,543 2,523
Other non-cash operating activities (392)    
Deferred tax expense 5,765 3,978 2,353
Deferred tax charge 22    
Accounts receivable      
Trade 764 3,999 3,650
Other 203 4,869 2,164
Prepaid expenses and other (86) 141 91
Inventory 314 859 (535)
Accounts payable (412) (3,121) 146
Accrued liabilities 25 (294) 2,051
Income taxes payable (1,690) (73) 596
Deferred revenue (2,008) (2,492) (1,432)
Cash provided by operating activities 54,243 49,478 42,614
INVESTING ACTIVITIES      
Purchase of marketable securities (4,667)    
Additions to property and equipment (4,309) (2,679) (2,385)
Acquisition of subsidiaries, net of cash acquired and bank indebtedness assumed (Note 3) (120,853) (82,152) (58,737)
Cash used in investing activities (129,829) (84,831) (61,122)
FINANCING ACTIVITIES      
Proceeds from borrowing on the debt facility   20,000 46,262
Payment of debt issuance costs   (386) (692)
Repayments of debt and other financial liabilities   (63,305) (3,722)
Issuance of common shares for cash, net of issuance costs 158 140,724 3,633
Settlement of stock options (Note 16) (2,590) (405) (1,361)
Cash (used in) provided by financing activities (2,432) 96,628 44,120
Effect of foreign exchange rate changes on cash (2,822) (5,927) (545)
(Decrease) increase in cash (80,840) 55,348 25,067
Cash, beginning of year 118,053 62,705 37,638
Cash, end of year 37,213 118,053 62,705
Supplemental disclosure of cash flow information:      
Cash paid during the year for interest 31 692 406
Cash paid during the year for income taxes $ 3,533 $ 2,983 $ 1,762