Commitments And Contingencies (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Other Commitments [Line Items]
Unreported loss liability	$ 1,900,000
Recoverable insurance amounts	962,000	$ 935,000
Property and equipment, net	31,878,000	$ 32,150,000
PerClot [Member]
Other Commitments [Line Items]
Prepaid royalties	1,500,000
Net intangible assets	2,000,000.0
Property and equipment, net	1,200,000
Maximum [Member]
Other Commitments [Line Items]
Estimated loss	$ 3,700,000
Starch Technology Purchase [Member]
Other Commitments [Line Items]
Term of distribution agreement	15 years
Expected future contingent payment amounts	$ 1,000,000.0
Number of notice days	180 days