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Commitments And Contingencies (Narrative) (Details) - USD ($) | Sep. 28, 2010 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Other Commitments [Line Items] |  |  |
Unreported loss liability |  | $ 1,900,000 | $ 1,900,000
Recoverable insurance amounts |  | 974,000 | 935,000
Property and equipment, net |  | 33,077,000 | $ 32,150,000
PerClot [Member] |  |  |
Other Commitments [Line Items] |  |  |
Prepaid royalties |  | 1,500,000 |
Net intangible assets |  | 1,800,000 |
Property and equipment, net |  | 1,200,000 |
Maximum [Member] |  |  |
Other Commitments [Line Items] |  |  |
Estimated loss |  | 4,000,000.0 |
Starch Technology Purchase [Member] |  |  |
Other Commitments [Line Items] |  |  |
Term of distribution agreement | 15 years |  |
Expected future contingent payment amounts |  | $ 1,000,000.0 |

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