The Company recognizes rent expense on a straight-line basis over the lease period. Rent expense recognized under all leases was $0.2 million and $0.6 million for the three months and nine months ended September 30, 2020, respectively. Rent expense recognized under all leases was $0.2 million and $0.5 million for the three months and nine months ended September 30, 2019, respectively.

The future minimum lease payments under all non-cancelable operating lease obligations as of September 30, 2020 were as follows (in thousands):

2020 (remaining 3 months)	$	1,018
2021		4,124
2022		3,560
2023		3,428
2024		3,525
2025 and thereafter		17,371
Total	$	33,026

In conjunction with the Menlo Park lease agreement, the Company issued a cash-collateralized letter of credit in lieu of security deposit of $0.2 million. In addition, the Company issued a cash-collateralized letter of credit for $4.1 million in 2018 for the new office lease in Redwood City. The Company also maintains a letter of credit of $0.2 million for the benefit of the landlord in connection with the Company’s office lease in Boston, Massachusetts. All cash amounts are recorded as restricted cash on the condensed consolidated balance sheet as of September 30, 2020 and December 31, 2019.

As of September 30, 2020, five of the seven lawsuits filed against the Company, its directors, Former Adicet, and/or Merger Sub in connection with the Merger had been dismissed. The Company has accrued $0.2 million as of September 30, 2020, for the resolution of claims in connection with the lawsuits. with the Merger, eight putative class action lawsuits have been filed against the Company, its directors, Former Adicet, and Merger Sub.