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Note 2 -Significant Accounting Policies - Impact of Changes to Financial Statements (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Costs (note 11) |  | $ 1,390 |  |  |  |  |  |  |  |  | $ 1,390 |  |  |  |  | $ 1,400
Total assets |  | 339,575 |  |  |  | $ 350,650 | [1] |  |  |  | 339,575 | $ 350,650 | [1] |  |  |
Liabilities and Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax liability (note 9) | [1] | 20,925 |  |  |  | 19,834 |  |  |  |  | 20,925 | 19,834 |  |  |  |
Retained earnings |  | 60,810 |  |  |  | 42,676 | [1] |  |  |  | 60,810 | 42,676 | [1] |  |  |
Total Liabilities and Shareholders' Equity |  | 339,575 |  |  |  | 350,650 | [1] |  |  |  | 339,575 | 350,650 | [1] |  |  |
Sales and marketing |  |  |  |  |  |  |  |  |  |  | 33,063 | 29,423 | [2] | $ 20,755 | [2] |
Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  | 26,155 | 24,075 | [2] | 25,113 | [2] |
Provision for income tax (note 9) |  |  |  |  |  |  |  |  |  |  | 9,020 | 1,748 | [2] | 9,046 | [2] |
Net income for the period |  | 4,436 | $ 5,347 | $ 3,608 | $ 3,744 | $ 11,199 |  | $ 3,439 | $ 5,241 | $ 2,446 | 17,135 | 22,327 | [2],[3] | 16,067 | [2],[3] |
Net amortization of contract costs |  |  |  |  |  |  |  |  |  |  | 14 |  |  |  |  |
Deferred income taxes (recovery) |  |  |  |  |  |  |  |  |  |  | 1,038 | (3,337) | [3] | 1,194 | [3] |
All other items |  |  |  |  |  |  |  |  |  |  | 19,022 |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  | 37,209 | $ 31,896 | [3] | $ 22,509 | [3] |
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Costs (note 11) |  | (1,390) |  |  |  |  |  |  |  |  | (1,390) |  |  |  |  |
Total assets |  | (1,390) |  |  |  |  |  |  |  |  | (1,390) |  |  |  |  |
Liabilities and Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax liability (note 9) |  | (338) |  |  |  |  |  |  |  |  | (338) |  |  |  |  | (300)
Retained earnings |  | (1,052) |  |  |  |  |  |  |  |  | (1,052) |  |  |  |  | $ (1,100)
Total Liabilities and Shareholders' Equity |  | (1,390) |  |  |  |  |  |  |  |  | (1,390) |  |  |  |  |
Sales and marketing |  |  |  |  |  |  |  |  |  |  | (14) |  |  |  |  |
Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  | 14 |  |  |  |  |
Provision for income tax (note 9) |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |
Net income for the period |  |  |  |  |  |  |  |  |  |  | 11 |  |  |  |  |
Net amortization of contract costs |  |  |  |  |  |  |  |  |  |  | (14) |  |  |  |  |
Deferred income taxes (recovery) |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |  |
All other items |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Calculated under Revenue Guidance in Effect before Topic 606 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contract Costs (note 11) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total assets |  | 338,185 |  |  |  |  |  |  |  |  | 338,185 |  |  |  |  |
Liabilities and Shareholders' Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax liability (note 9) |  | 20,587 |  |  |  |  |  |  |  |  | 20,587 |  |  |  |  |
Retained earnings |  | 59,758 |  |  |  |  |  |  |  |  | 59,758 |  |  |  |  |
Total Liabilities and Shareholders' Equity |  | $ 338,185 |  |  |  |  |  |  |  |  | 338,185 |  |  |  |  |
Sales and marketing |  |  |  |  |  |  |  |  |  |  | 33,049 |  |  |  |  |
Income before provision for income taxes |  |  |  |  |  |  |  |  |  |  | 26,169 |  |  |  |  |
Provision for income tax (note 9) |  |  |  |  |  |  |  |  |  |  | 9,023 |  |  |  |  |
Net income for the period |  |  |  |  |  |  |  |  |  |  | 17,146 |  |  |  |  |
Net amortization of contract costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred income taxes (recovery) |  |  |  |  |  |  |  |  |  |  | 1,041 |  |  |  |  |
All other items |  |  |  |  |  |  |  |  |  |  | 19,022 |  |  |  |  |
Net cash provided by operating activities |  |  |  |  |  |  |  |  |  |  | $ 37,209 |  |  |  |  |
[1] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.
[2] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.
[3] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.

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