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Commitments and Contingencies (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Commitment And Contingencies [Line Items] |
Remaining minimum distribution payments | $ 3.8
Maximum [Member] |
Commitment And Contingencies [Line Items] |
Purchase commitment, remaining minimum amount payment date | May 26, 2020
California office lease one |
Commitment And Contingencies [Line Items] |
Lease expiration period | 2020-01
California office lease two |
Commitment And Contingencies [Line Items] |
Lease expiration period | 2021-04
Illinois office lease |
Commitment And Contingencies [Line Items] |
Lease expiration period | 2023-06
Arizona office lease |
Commitment And Contingencies [Line Items] |
Lease expiration period | 2019-08
Automobile lease |
Commitment And Contingencies [Line Items] |
Lease expiration period | 2020-05
Netherlands warehouse lease |
Commitment And Contingencies [Line Items] |
Lease expiration period | 2019-08

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