Rental Equipment, net (Details) - Rental equipment consists of the following: - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Rental Equipment, net (Details) - Rental equipment consists of the following: [Line Items]
Rental equipment	$ 4,308,000	$ 4,291,000
Less accumulated depreciation	3,579,000	3,364,000
Net rental equipment	$ 729,000	$ 927,000

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