Investment in Equipment and Leases, Net (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Lessor, Lease, Description [Line Items]
Depreciation of operating lease assets	$ 348,000	$ 423,000	$ 1,034,000	$ 1,179,000
Amortization of initial direct costs	$ 6,000	9,000	$ 21,000	24,000
Average estimated residual value of assets on operating leases	27.00%		27.00%		28.00%
Operating leases in non-accrual status	$ 0		$ 0		$ 0
Equipment on operating leases, depreciation method			straight-line
Operating Leases [Member]
Lessor, Lease, Description [Line Items]
Lease investment impairment charges			$ 0	0
Depreciation of operating lease assets	348,000	423,000	1,000,000.0	1,200,000
Additional depreciation	7,000	102,000	14,000	167,000
Amortization of initial direct costs	$ 6,000	$ 9,000	$ 21,000	$ 24,000