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Summary of Significant Accounting Policies and Other Information - Schedule of Other Accrued Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |  |  |  |  |  |  |  |
Warranty | $ 12,628 |  |  |  | $ 10,200 |  |  |  | $ 4,429 | $ 2,428 | $ 1,274
Litigation reserves | 12,137 |  |  |  | 10,287 |  |  |  | 3 | 0 |
Deferred revenue | 2,822 |  |  |  | 1,818 |  |  |  | 3,564 | 4,602 |
Accrued compensation and benefits | 2,593 |  |  |  | 3,975 |  |  |  | 3,825 | 5,476 |
Professional services | 1,974 |  |  |  | 1,509 |  |  |  | 544 | 500 |
Income taxes payable | 375 |  |  |  | 131 |  |  |  | 107 | 2,973 |
Other | 5,833 |  |  |  | 4,587 |  |  |  | 5,374 | 2,203 |
Balance at end of year | $ 38,362 | $ 41,393 | $ 35,379 | $ 35,234 | $ 32,507 | $ 22,405 | $ 19,182 | $ 17,929 | $ 17,846 | $ 18,182 |

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