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Note 7 - Derivative Instruments and Hedging Activities (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] |
Derivatives | Balance Sheet Location |  | December 31, 201 6 Assets at Fair Value |  |  | December 31, 201 5 Liabilities at Fair Value |
Foreign currency forward contracts designated as cash flow hedges | Derivative instruments |  | $ | 155,560 |  |  | $ | (1,721,683 | )
Foreign currency forward contracts not designated as cash flow hedges | Derivative instruments |  | $ | 17,328 |  |  | $ | (305,403 | )
Total foreign currency forward contracts | Derivative instruments |  | $ | 172,888 |  |  | $ | (2,027,086 | )
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, 2015 |  | $ | (1,721,683 | ) |  | $ | 612,231 |  |  | $ | (1,109,452 | )
Other comprehensive income (loss) before reclassifications |  |  | 871,925 |  |  |  | (304,109 | ) |  |  | 567,816 |
Amount reclassified from accumulated other comprehensive income |  |  | 1,005,318 |  |  |  | (364,528 | ) |  |  | 640,790 |
Other comprehensive income (loss) for the year ended December 31, 2016 |  |  | 1,877,243 |  |  |  | (668,637 | ) |  |  | 1,208,606 |
Ending AOCI balance – December 31, 2016 |  | $ | 155,560 |  |  | $ | (56,406 | ) |  | $ | 99,154 |
|  | Gains and losses on cash flow hedges |  |  | Tax impact |  |  | Total AOCI |
Opening AOCI balance – December 31, 2014 |  | $ | (946,676 | ) |  | $ | 324,235 |  |  | $ | (622,441 | )
Other comprehensive income (loss) before reclassifications |  |  | (3,171,740 | ) |  |  | 1,140,275 |  |  |  | (2,031,465 | )
Amount reclassified from accumulated other comprehensive income |  |  | 2,396,733 |  |  |  | (852,279 | ) |  |  | 1,544,454 |
Other comprehensive income (loss) for the year ended December 31, 2015 |  |  | (775,007 | ) |  |  | 287,996 |  |  |  | (487,011 | )
Ending AOCI balance – December 31, 2015 |  | $ | (1,721,683 | ) |  | $ | 612,231 |  |  | $ | (1,109,452 | )
|  | Gains and losses on cash flow hedge s |  |  | Tax impac t |  |  | Total AOC I |
Opening AOCI balance – December 31, 2013 |  | $ | (372,593 | ) |  | $ | 127,612 |  |  | $ | (244,981 | )
Other comprehensive income (loss) before reclassification s |  |  | (1,527,171 | ) |  |  | 523,056 |  |  |  | (1,004,115 | )
Amount reclassified from accumulated other comprehensive incom e |  |  | 953,088 |  |  |  | (326,433 | ) |  |  | 626,655 |
Other comprehensive income (loss) for the year ended December 31, 2014 |  |  | (574,083 | ) |  |  | 196,623 |  |  |  | (377,460 | )
Ending AOCI balance – December 31, 2014 |  | $ | (946,676 | ) |  | $ | 324,235 |  |  | $ | (622,441 | )
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 |
|  |  |  |  | Operating expenses |  | $ | (736,616 | ) |  |  |  |  |
Foreign currency forward contracts – year ended December 31, 2016 |  | $ | 1,208,606 |  | Cost of revenues |  | $ | (221,460 | ) | Operating expenses |  | $ | (47,242 | )
|  |  |  |  | Operating expenses |  | $ | (1,870,818 | ) |  |  |  |  |
Foreign currency forward contracts – year ended December 31, 2015 |  | $ | (487,011 | ) | Cost of revenues |  | $ | (525,916 | ) | Operating expenses |  | $ | (294,113 | )
|  |  |  |  | Operating expense s |  | $ | (704,42 7 | ) |  |  |  |  |
Foreign currency forward contracts – year ended December 31, 2014 |  | $ | (377,46 0 | ) | Cost of revenue s |  | $ | (248,66 2 | ) | Operating expenses |  | $ | (20,53 5 | )

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