Investment in equipment and leases, net (Investment in Leases) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)
Lessor, Lease, Description [Line Items]
Balance December 31, 2020	$ 10,057
Reclassifications & Additions/ Dispositions	(460)
Depreciation/ Amortization Expense or Amortization of Leases	(2,064)
Balance March 31, 2022	7,533
Operating Leases [Member]
Lessor, Lease, Description [Line Items]
Balance December 31, 2020	9,297
Reclassifications & Additions/ Dispositions	(192)
Depreciation/ Amortization Expense or Amortization of Leases	(2,063)
Balance March 31, 2022	7,042
Assets Held for Sale [Member]
Lessor, Lease, Description [Line Items]
Balance December 31, 2020	756
Reclassifications & Additions/ Dispositions	(268)
Depreciation/ Amortization Expense or Amortization of Leases	0
Balance March 31, 2022	488
Initial Direct Cost [Member]
Lessor, Lease, Description [Line Items]
Balance December 31, 2020	4
Reclassifications & Additions/ Dispositions	0
Depreciation/ Amortization Expense or Amortization of Leases	(1)
Balance March 31, 2022	$ 3

ATEL 15, LLC 10-K