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Note 7 - Derivative Instruments and Hedging Activities (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Derivative Instruments [Table Text Block] |
Maturity date (Dollar amounts in thousands of U.S. dollars) |  | Notional amount of U.S. dollars |  |  | Weighted average exchange rate of U.S. dollars |  |  | Fair value |
January - March 2019 |  |  | 9,955 |  |  |  | 1.3131 |  |  |  | 355 |
April - June 2019 |  |  | 10,381 |  |  |  | 1.3154 |  |  |  | 332 |
July - September 2019 |  |  | 9,881 |  |  |  | 1.3136 |  |  |  | 310 |
October - December 2019 |  |  | 10,327 |  |  |  | 1.3174 |  |  |  | 279 |
|  | $ | 40,544 |  |  |  | 1.3149 |  |  | $ | 1,276 |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] |
Derivatives (Dollar amounts in thousands of U.S. dollars) | Balance Sheet Location |  | December 31, 2018 Liability at Fair Value |  |  | December 31, 2017 Liability at Fair Value |
Foreign currency forward contracts designated as cash flow hedges | Derivative instruments |  | $ | 1,069 |  |  | $ | — |
Foreign currency forward contracts not designated as cash flow hedges | Derivative instruments |  | $ | 207 |  |  | $ | — |
Total foreign currency forward contracts | Derivative instruments |  | $ | 1,276 |  |  | $ | — |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Gains and losses on cash flow hedges |  |  | Tax impact |  |  | Total AOCI |
Opening AOCI balance – December 31, 2017 |  | $ | — |  |  | $ | — |  |  | $ | — |
Other comprehensive income (loss) before reclassifications |  |  | (1,350 | ) |  |  | 328 |  |  |  | (1,022 | )
Amount reclassified from accumulated other comprehensive income |  |  | 281 |  |  |  | (69 | ) |  |  | 212 |
Other comprehensive income (loss) for the year ended December 31, 2018 |  |  | (1,069 | ) |  |  | 259 |  |  |  | (810 | )
Ending AOCI balance – December 31, 2018 |  | $ | (1,069 | ) |  | $ | 259 |  |  | $ | (810 | )
|  | Gains and losses on cash flow hedges |  |  | Tax impact |  |  | Total AOCI |
Opening AOCI balance – December 31, 2016 |  | $ | 156 |  |  | $ | (56 | ) |  | $ | 100 |
Other comprehensive income (loss) before reclassifications |  |  | 863 |  |  |  | (313 | ) |  |  | 550 |
Amount reclassified from accumulated other comprehensive income |  |  | (1,019 | ) |  |  | 369 |  |  |  | (650 | )
Other comprehensive income (loss) for the year ended December 31, 2017 |  |  | (156 | ) |  |  | 56 |  |  |  | (100 | )
Ending AOCI balance – December 31, 2017 |  | $ | — |  |  | $ | — |  |  | $ | — |
|  | Gains and losses on cash flow hedges |  |  | Tax impact |  |  | Total AOCI |
Opening AOCI balance – December 31, 2015 |  | $ | (1,721 | ) |  | $ | 612 |  |  | $ | (1,109 | )
Other comprehensive income (loss) before reclassifications |  |  | 872 |  |  |  | (304 | ) |  |  | 568 |
Amount reclassified from accumulated other comprehensive income |  |  | 1,005 |  |  |  | (364 | ) |  |  | 641 |
Other comprehensive income (loss) for the year ended December 31, 2016 |  |  | 1,877 |  |  |  | (668 | ) |  |  | 1,209 |
Ending AOCI balance – December 31, 2016 |  | $ | 156 |  |  | $ | (56 | ) |  | $ | 100 |
Derivative Instruments, Gain (Loss) [Table Text Block] |
Derivatives in Cash Flow Hedging Relationship |  | Amount of Gain or (Loss) Recognized in OCI, net of tax, on Derivative (Effective Portion) |  | Location of Gain or (Loss) Reclassified from Accumulated OCI into Income (Effective Portion) |  | Amount of Gain or (Loss) Reclassified from Accumulated OCI into Income, (Effective Portion) |  | Location of Gain or (Loss) Recognized in Income on Derivative (ineffective Portion and Amount Excluded from Effectiveness Testing) |  | Amount of Gain or (Loss) Recognized in Income on Derivative (ineffective Portion and Amount Excluded from Effectiveness |
Foreign currency forward contracts – year ended December 31, 2018 |  |  |  |  | Operating expenses |  | $ | (245 | ) |  |  |  |  |
|  | $ | (810 | ) | Cost of revenues |  | $ | (36 | ) | Operating expenses |  | $ | — |
|  |  |  |  | Operating expenses |  | $ | 879 |  |  |  |  |  |
Foreign currency forward contracts – year ended December 31, 2017 |  | $ | (100 | ) | Cost of revenues |  | $ | 140 |  | Operating expenses |  | $ | — |
|  |  |  |  | Operating expenses |  | $ | (737 | ) |  |  |  |  |
Foreign currency forward contracts – year ended December 31, 2016 |  | $ | 1,209 |  | Cost of revenues |  | $ | (221 | ) | Operating expenses |  | $ | (47 | )

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624181-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41620-113959 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41638-113959 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41678-113959 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=109980867&loc=d3e41641-113959 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579240-113959 + Details
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