Summary Of Significant Accounting Policies (Schedule Of Warranty Accrual Activity) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2022 USD ($)
Summary Of Significant Accounting Policies [Abstract]
Beginning balance	$ 80
Add: Accruals for warranties issued during the period	17
Ending balance	$ 97

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 http://asc.fasb.org/extlink&oid=123368208&loc=d3e12565-110249

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