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Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Notional Amounts of Outstanding Derivative Positions | The Company had the following outstanding forward contracts (in thousands):
| December 31, 2018 |  | December 31, 2017
Currency | Notional Value |  | USD Equivalent |  |  | Notional Value |  | USD Equivalent |
Derivatives Not Designated as Hedging Instruments:
Euro | 23,000 |  | $ | 26,330 |  |  | — |  | $ | — |
Japanese Yen | 380,000 |  | 3,459 |  |  | 455,000 |  | 4,049 |
British Pound | 2,500 |  | 3,204 |  |  | 1,650 |  | 2,232 |
Korean Won | 3,125,000 |  | 2,808 |  |  | 1,825,000 |  | 1,708 |
Hungarian Forint | 750,000 |  | 2,685 |  |  | 545,000 |  | 2,110 |
Taiwanese Dollar | 55,000 |  | 1,807 |  |  | 37,725 |  | 1,278 |
Canadian Dollar | 990 |  | 726 |  |  | — |  | — |
Singapore Dollar | 700 |  | 514 |  |  | — |  | — |
Swiss Franc | — |  | — |  |  | 1,365 |  | 1,401 |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | Information regarding the fair value of the outstanding forward contracts was as follows (in thousands):
| Asset Derivatives |  | Liability Derivatives
| Balance Sheet Location |  | Fair Value |  | Balance Sheet Location |  | Fair Value
|  | December 31, 2018 |  | December 31, 2017 |  |  | December 31, 2018 |  | December 31, 2017
Derivatives Not Designated as Hedging Instruments:
Economic hedge forward contracts | Prepaid expenses and other current assets |  | $ | 1 |  |  | $ | 16 |  |  | Accrued expenses |  | $ | 106 |  |  | $ | 13 |
Offsetting Assets | The following table summarizes the gross activity for all derivative assets and liabilities which were presented on a net basis on the Consolidated Balance Sheets due to the right of offset with each counterparty (in thousands):
Asset Derivatives |  | Liability Derivatives
|  | December 31, 2018 |  | December 31, 2017 |  |  |  | December 31, 2018 |  | December 31, 2017
Gross amounts of recognized assets |  | $ | 1 |  |  | $ | 16 |  |  | Gross amounts of recognized liabilities |  | $ | 106 |  |  | $ | 13 |
Gross amounts offset |  | — |  |  | — |  |  | Gross amounts offset |  | — |  |  | — |
Net amount of assets presented |  | $ | 1 |  |  | $ | 16 |  |  | Net amount of liabilities presented |  | $ | 106 |  |  | $ | 13 |
Derivative Instruments, Gain (Loss) | Information regarding the effect of derivative instruments, net of the underlying exposure, on the consolidated financial statements was as follows (in thousands):
| Location in Financial Statements |  | Year Ended December 31,
2018 |  | 2017 |  | 2016
Derivatives Designated as Hedging Instruments:
Gains (losses) recorded in shareholders' equity (effective portion) | Accumulated other comprehensive income (loss), net of tax |  | $ | — |  |  | $ | — |  |  | $ | 37 |
Gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations (effective portion) | Revenue |  | $ | — |  |  | $ | 30 |  |  | $ | (438 | )
| Research, development, and engineering expenses |  | — |  |  | 3 |  |  | 13 |
| Selling, general, and administrative expenses |  | — |  |  | 8 |  |  | 27 |
| Total gains (losses) reclassified from accumulated other comprehensive income (loss) into current operations |  | $ | — |  |  | $ | 41 |  |  | $ | (398 | )
Derivatives Not Designated as Hedging Instruments:
Gains (losses) recognized in current operations | Foreign currency gain (loss) |  | $ | (285 | ) |  | $ | 270 |  |  | $ | (515 | )
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) | The following table summarizes the changes in accumulated other comprehensive income (loss), net of tax, related to derivative instruments (in thousands):
Balance as of December 31, 2016 | $ | 37 |
Net unrealized gain (loss) on cash flow hedges | 4 |
Reclassification of net realized (gain) loss on cash flow hedges into current operations | (41 | )
Balance as of December 31, 2017 | — |
Balance as of December 31, 2018 | $ | — |

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