Rental Equipment, net (Details) - Schedule Of Rental Equipment - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Rental Equipment, net (Details) - Schedule Of Rental Equipment [Line Items]
Rental equipment	$ 3,714,000	$ 3,714,000
Less accumulated depreciation	3,120,000	3,058,000
Net rental equipment	$ 594,000	$ 656,000

Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Name:	us-gaap_PropertyPlantAndEquipmentOther
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant