Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Other Commitments [Line Items]
Sublease income	$ 227	$ 679	$ 910
Unreported loss liability	1,900	1,900	1,700
Recoverable insurance amounts	943	943	693
Property and equipment, net	30,434	30,434	$ 31,028
PerClot [Member]
Other Commitments [Line Items]
Prepaid royalties	1,500	1,500
Net intangible assets	2,100	2,100
Property and equipment, net	1,200	1,200
Maximum [Member]
Other Commitments [Line Items]
Estimated loss	3,800	$ 3,800
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