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v3.19.1

Revenue (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disaggregation of Revenue |  |
Product warranty period | 1 year |
Extended warranty period | 1 year |
Change in contract liabilities | $ 4,400 |
Contract liabilities | 22,584 | $ 18,145
Deferred revenue | 19,513 | 16,181
Long-term deferred revenue | 3,071 | $ 1,964
ASC 606 Adjustments |  |
Disaggregation of Revenue |  |
Contract liabilities | 2,623 |
ASC 606 Adjustments | ASU 2014-09 |  |
Disaggregation of Revenue |  |
Reclassification gross decrease in customer contract liabilities | $ 1,600 |
ASC 606 Adjustments | Maximum |  |
Disaggregation of Revenue |  |
Unsatisfied extended warranty performance obligations, period | 24 months |
Systems |  |
Disaggregation of Revenue |  |
Payment upon shipment of tool, as a percent | 90.00% |
Payment upon installation, as a percent | 10.00% |
Payment upon delivery of parts, period | 90 days |
Systems | Minimum |  |
Disaggregation of Revenue |  |
Payment upon delivery of parts, period | 30 days |
Systems | Maximum |  |
Disaggregation of Revenue |  |
Payment upon delivery of parts, period | 60 days |
Systems | ASC 606 Adjustments |  |
Disaggregation of Revenue |  |
Increase in revenue | $ 1,000 |
Aftermarket | Minimum |  |
Disaggregation of Revenue |  |
Extended warranty period | 1 year |
Aftermarket | Maximum |  |
Disaggregation of Revenue |  |
Extended warranty period | 3 years |

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