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Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2019 | Dec. 31, 2018
Other Commitments [Line Items] |  |  |
Sublease income | $ 226 | $ 452 | $ 910
Unreported loss liability | 1,900 | 1,900 | 1,700
Recoverable insurance amounts | 897 | 897 | 693
Property and equipment, net | 30,823 | 30,823 | $ 31,028
PerClot [Member] |  |  |
Other Commitments [Line Items] |  |  |
Prepaid royalties | 1,500 | 1,500 |
Net intangible assets | 2,200 | 2,200 |
Property and equipment, net | 1,300 | 1,300 |
Maximum [Member] |  |  |
Other Commitments [Line Items] |  |  |
Estimated loss | 3,700 | $ 3,700 |
Starch Technology Purchase [Member] |  |  |
Other Commitments [Line Items] |  |  |
Term of distribution agreement |  | 15 years |
Expected future contingent payment amounts | $ 1,000 | $ 1,000 |
Number of notice days |  | 180 days |

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