Additional Financial Statement Information Additional Financial Statement Information (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended |
---|---|---|
Dec. 31, 2016 |
Dec. 31, 2017 |
|
Condensed Balance Sheet Statements, Captions [Line Items] | ||
Monthly deposits as percentage of monthly salary | 8.33% | |
Other Liabilities | ||
Condensed Balance Sheet Statements, Captions [Line Items] | ||
Severance liability | $ 6.6 | $ 7.8 |
Tianjin, People's Republic of China [Member] | ||
Condensed Balance Sheet Statements, Captions [Line Items] | ||
Proceeds from lease termination payments | $ (1.5) | |
Karmiel, Israel Facility | ||
Condensed Balance Sheet Statements, Captions [Line Items] | ||
Proceeds from sale of building | $ 3.7 | |
Lease term | 5 years | |
Gain on sale of building | $ 1.7 | |
Current period gain recognized | 0.8 | |
Deferred revenue | $ 0.9 |