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Unearned Revenue (Tables) | 3 Months Ended
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Mar. 31, 2018
Revenue Recognition And Deferred Revenue [Abstract] |
Schedule of Unearned Revenue by Segment | Unearned revenue by segment was as follows:
| March 31, 2018 |  |  | December 31, 2017 |
Automotive | $ | 3,426 |  |  | $ | — |
Industrial |  | 3,374 |  |  |  | 4,889 |
Total | $ | 6,800 |  |  | $ | 4,889 |
Schedule of Changes in Unearned Revenue | Changes in unearned revenue were as follows:
Three Month Ended March 31, 2018 |  |  |
Balance, beginning of period | $ | 4,889 |
Additions to unearned revenue |  | 6,909 |
Reclassified to revenue |  | (4,999 | )
Currency Impacts |  | 1 |
Balance, end of period | $ | 6,800 |

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