6. Restricted Cash

At September 30, 2019, the Company had $4.0 million in restricted cash, of which $0.6 million was classified as short-term and $3.4 million as long-term.

In connection with the execution of the 2019 Lease (See Note 8), the Company was required to provide the landlord with a letter of credit in the amount of $3.1 million that will expire 95 days after expiration or early termination of the 2019 Lease. The Company will have the right, under certain conditions, to reduce the amount of the letter of credit to $2.1 million in October 2023. The $3.1 million letter of credit was classified as long-term restricted cash on the Company’s condensed consolidated balance sheet as of September 30, 2019.

At December 31, 2018, the Company had $0.9 million in restricted cash, of which $0.6 million was classified as short-term and $0.3 million was classified as long-term.

In August 2018, the Company entered into a manufacturing agreement with a third party for manufacturing services related to one of its product candidates. In accordance with the terms of the manufacturing agreement, the Company was required to provide a letter of credit in the amount of $0.6 million. The initial term of the letter of credit expired on September 30, 2019 and under the terms of the manufacturing agreement, automatically renewed for an additional one-year period. The letter of credit will continue to automatically renew for additional one-year periods unless 90 days’ notice is provided to the bank by the Company or unless released by the third-party manufacturer. The letter of credit was classified as short-term on the Company’s condensed consolidated balance sheets as of September 30, 2019.

In October 2019, the third-party manufacturer released the Company from the letter of credit in accordance with the terms of the manufacturing agreement. In connection with this release, the Company collected the $0.6 million in full and the letter of credit is no longer outstanding.

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the condensed consolidated balance sheets that sum to the total of the amounts shown in the Company’s condensed consolidated statement of cash flows as of September 30, 2019, December 31, 2018, September 30, 2018 and December 31, 2017 (in thousands):