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Market Segments, Geographic Information and Significant Customers Revenue (Details) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
UNITED STATES |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Percent of total revenue | 76.00% | 70.00% | 71.00%
International Sales [Domain] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Percent of total revenue | 24.00% | 30.00% | 29.00%
Hospira [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Concentration Risk, Percentage |  | 30.00% | 36.00%
Hospira [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Percentage of total accounts receivable |  | 23.00% |

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