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Revenue From Contracts With Customers (Tables) | 12 Months Ended
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Dec. 31, 2018
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following tables represent a disaggregation of revenue from contracts with customers for the year ended December 31, 2018.
Sales by application |  |  |  |  |  |  |  |  |  |
Materials processing |  |  |  | $ | 1,374,448 |  |  |  |  |  |
Other applications |  |  |  | 85,426 |  |  |  |  |  |
Total |  |  |  | $ | 1,459,874 |  |  |  |  |  |
Sales by product |  |  |  |  |  |  |  |  |
High Power Continuous Wave ("CW") Lasers |  |  |  | $ | 909,726 |  |  |  |  |
Medium and Low Power CW Lasers |  |  |  | 95,764 |  |  |  |  |
Pulsed Lasers |  |  |  | 162,048 |  |  |  |  |
Quasi-Continuous Wave ("QCW") Lasers |  |  |  | 66,700 |  |  |  |  |
Laser Systems |  |  |  | 59,330 |  |  |  |  |
Other Revenue including Amplifiers, Service, Parts, Accessories and Change in Deferred Revenue |  |  |  | 166,306 |  |  |  |  |
Total |  |  |  | $ | 1,459,874 |  |  |  |  |
Sales by geography |  |  |  |  |  |  |  |  |
North America |  |  |  | $ | 202,743 |  |  |  |  |
Europe: |  |  |  |  |  |  |  |  |
Germany |  |  |  | 111,259 |  |  |  |  |
Other including Eastern Europe/CIS |  |  |  | 296,917 |  |  |  |  |
Asia and Australia: |  |  |  |  |  |  |  |  |
China |  |  |  | 629,079 |  |  |  |  |
Japan |  |  |  | 87,619 |  |  |  |  |
Other |  |  |  | 127,251 |  |  |  |  |
Rest of World |  |  |  | 5,006 |  |  |  |  |
Total |  |  |  | $ | 1,459,874 |  |  |  |  |
Timing of revenue recognition |  |  |  |  |  |  |  |  |
Goods and services transferred at a point in time |  |  |  | $ | 1,447,343 |  |  |  |  |
Services transferred over time |  |  |  | 12,531 |  |  |  |  |
Total |  |  |  | $ | 1,459,874 |  |  |  |  |
Changes in Contract Assets and Liabilities | The following table reflects the changes in the Company's contract assets and liabilities for the year ended December 31, 2018:
| December 31, |  | January 1, |  |  |  |
| 2018 |  | 2018 |  | Change |  |
Contract assets |  |  |  |  |  |  |
Contract assets | 10,102 |  | — |  | 10,102 |  | 100.0 | %
Contract liabilities |  |  |  |  |  |  |
Contract liabilities - current | 52,606 |  | 46,508 |  | 6,098 |  | 13.1 | %
Contract liabilities - long-term | 1,413 |  | 182 |  | 1,231 |  | 676.4 | %
Schedule of Remaining Performance Obligations | The following table represents the Company's remaining performance obligations from contracts that are recognized over time as of December 31, 2018:
|  | Remaining Performance Obligations |  |  |  |  |  |  |  |  |  |  |  |
|  | 2019 |  | 2020 |  | 2021 |  | 2022 |  | 2023 |  | 2024 |  | Total
Revenue expected to be recognized for extended warranty agreements |  | 3,302 |  | 760 |  | 375 |  | 203 |  | 71 |  | 4 |  | 4,715
Revenue to be earned over time from contracts to sell robotic systems |  | 38,038 |  | 1,700 |  | — |  | — |  | — |  | — |  | 39,738
Total |  | $ | 41,340 |  | $ | 2,460 |  | $ | 375 |  | $ | 203 |  | $ | 71 |  | $ | 4 |  | $ | 44,453

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