Description of Business and Summary of Significant Accounting Policies (Warranties) (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| Changes in the product warranty liability | |||
| Balance at the beginning of the period | $ 2,032 | $ 1,945 | $ 1,415 |
| Warranty costs accrued | 4,040 | 3,147 | 2,458 |
| Warranty claims | (3,548) | (3,060) | (1,928) |
| Balance at the end of the period | $ 2,524 | $ 2,032 | $ 1,945 |
| Alternate | |||
| Product Warranty | |||
| Product warranty period | 3 years | ||
| Minimum | |||
| Product Warranty | |||
| Product warranty period | 2 years | ||
| Maximum | |||
| Product Warranty | |||
| Product warranty period | 10 years | ||