Related Party Transactions (Affiliates Earned Commissions and Billed for Reimbursements Pursuant to Operating Agreement (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Selling commissions, equal to 9% of the selling price of the Limited Liability Company Units, deducted from Other Members capital				$ 31
Reimbursement of other syndication costs to Managing Member and/or affiliates, deducted from Other Members capital				20
Administrative costs reimbursed to Managing Member and/or affiliates	$ 77	$ 98	$ 254	314
Asset management fees to managing Member	68	68	201	200
Acquisition and initial direct costs paid to Managing Member	53	18	53	135
Related party transaction, total	$ 198	$ 184	$ 508	$ 700
Selling commission rate			9.00%
Broker Dealers [Member]
Selling commission rate			7.00%
Affiliated Entity [Member]
Selling commission rate			2.00%