Summary Of Significant Accounting Policies (Schedule Of Warranty Accrual Activity) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2022
Summary Of Significant Accounting Policies [Abstract]
Beginning balance	$ 97	$ 80
Add: Accruals for warranties issued during the period	25	42
Ending balance	$ 122	$ 122

Amount of increase in the standard product warranty accrual from warranties issued. Excludes extended product warranties.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph ((c)(3))
-URI https://asc.fasb.org/extlink&oid=126907703&loc=d3e12565-110249

Name:	us-gaap_StandardProductWarrantyAccrualWarrantiesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration