Organization and Limited Liability Company Matters	12 Months Ended
Dec. 31, 2019
Organization and Limited Liability Company Matters [Abstract]
Organization and Limited Liability Company Matters	1. Organization and Limited Liability Company matters: ATEL 17, LLC (the “Company” or the “Fund”) was formed under the laws of the state of California on April 16, 2015 (“Date of Inception”) for the purpose of equipment financing and acquiring equipment to engage in equipment leasing and sales activities. The Managing Member of the Company is ATEL Managing Member, LLC (the “Managing Member” or “Manager”), a Nevada limited liability company. The Managing Member is controlled by ATEL Financial Services, LLC (“AFS”), a wholly-owned subsidiary of ATEL Capital Group. The Fund may continue as provided in the ATEL 17, LLC limited liability operating agreement dated April 24, 2015 (the “Operating Agreement”). Contributions in the amount of $500 were received as of April 28, 2015, which represented the initial member’s capital investment. As a limited liability company, the liability of any individual member for the obligations of the Fund is limited to the extent of capital contributions to the Fund by the individual member. The offering of the Company was granted effectiveness by the Securities and Exchange Commission as of January 5, 2016. The offering will continue until the earlier of a period of two years from that date or until sales of the limited liability company units (Units) to the public reach $150 million. As of February 2, 2016, subscriptions for the minimum number of Units (120,000, representing $1.2 million), excluding subscriptions from Pennsylvania investors, had been received and the Fund requested subscription proceeds to be released from escrow. On that date, the Company commenced initial operations and continued in its development stage activities until transitioning to an operating enterprise during the first quarter of 2016. Pennsylvania subscriptions are subject to a separate escrow and are released to the Fund only when aggregate subscriptions for all investors equal to at least $7.5 million. Total contributions to the Fund exceeded $7.5 million on July 6, 2016, at which time a request was processed to release the Pennsylvania escrowed amounts. The offering terminated on January 5, 2018. As of December 31, 2019, cumulative gross contributions, less rescissions and repurchases (net of distributions paid and allocated syndication costs, as applicable), totaling $25.7 million (inclusive of the $500 initial Member’s capital investment) have been received. As of the same date, 2,565,749 Units were issued and outstanding. The Company’s principal objectives are to invest in a diversified portfolio of investments that will (i) preserve, protect and return the Company’s invested capital; (ii) generate regular cash distributions to members, with any balance remaining after required minimum distributions to be used to purchase additional investments during the Reinvestment Period (ending six calendar years after the completion of the Company’s public offering of Units) and (iii) provide additional cash distributions following the Reinvestment Period and until all investment portfolio assets have been sold or otherwise disposed. Pursuant to the terms of the Operating Agreement, the Managing Member and/or its affiliates receives compensation for services rendered and reimbursements for costs incurred on behalf of the Company. (See Note 7, Related party transactions.) The Company is required to maintain reasonable cash reserves for working capital, for the repurchase of Units and for contingencies. The repurchase of Units is solely at the discretion of the Managing Member.

1. Organization and Limited Liability Company matters:

ATEL 17, LLC (the “Company” or the “Fund”) was formed under the laws of the state of California on April 16, 2015 (“Date of Inception”) for the purpose of equipment financing and acquiring equipment to engage in equipment leasing and sales activities. The Managing Member of the Company is ATEL Managing Member, LLC (the “Managing Member” or “Manager”), a Nevada limited liability company. The Managing Member is controlled by ATEL Financial Services, LLC (“AFS”), a wholly-owned subsidiary of ATEL Capital Group. The Fund may continue as provided in the ATEL 17, LLC limited liability operating agreement dated April 24, 2015 (the “Operating Agreement”). Contributions in the amount of $500 were received as of April 28, 2015, which represented the initial member’s capital investment. As a limited liability company, the liability of any individual member for the obligations of the Fund is limited to the extent of capital contributions to the Fund by the individual member.

The offering of the Company was granted effectiveness by the Securities and Exchange Commission as of January 5, 2016. The offering will continue until the earlier of a period of two years from that date or until sales of the limited liability company units (Units) to the public reach $150 million. As of February 2, 2016, subscriptions for the minimum number of Units (120,000, representing $1.2 million), excluding subscriptions from Pennsylvania investors, had been received and the Fund requested subscription proceeds to be released from escrow. On that date, the Company commenced initial operations and continued in its development stage activities until transitioning to an operating enterprise during the first quarter of 2016. Pennsylvania subscriptions are subject to a separate escrow and are released to the Fund only when aggregate subscriptions for all investors equal to at least $7.5 million. Total contributions to the Fund exceeded $7.5 million on July 6, 2016, at which time a request was processed to release the Pennsylvania escrowed amounts. The offering terminated on January 5, 2018.

As of December 31, 2019, cumulative gross contributions, less rescissions and repurchases (net of distributions paid and allocated syndication costs, as applicable), totaling $25.7 million (inclusive of the $500 initial Member’s capital investment) have been received. As of the same date, 2,565,749 Units were issued and outstanding.

The Company’s principal objectives are to invest in a diversified portfolio of investments that will (i) preserve, protect and return the Company’s invested capital; (ii) generate regular cash distributions to members, with any balance remaining after required minimum distributions to be used to purchase additional investments during the Reinvestment Period (ending six calendar years after the completion of the Company’s public offering of Units) and (iii) provide additional cash distributions following the Reinvestment Period and until all investment portfolio assets have been sold or otherwise disposed.

Pursuant to the terms of the Operating Agreement, the Managing Member and/or its affiliates receives compensation for services rendered and reimbursements for costs incurred on behalf of the Company. (See Note 7, Related party transactions.) The Company is required to maintain reasonable cash reserves for working capital, for the repurchase of Units and for contingencies. The repurchase of Units is solely at the discretion of the Managing Member.