Borrowings - Schedule of Information Relating to Long-term Borrowings from FHLB of Boston (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Federal Home Loan Bank Advances [Line Items]
FHLB of Boston long-term borrowings		$ 16,442	$ 17,835
FHLB of Boston long-term borrowings, percentage		3.67%	3.55%
2022
Federal Home Loan Bank Advances [Line Items]
FHLB of Boston long-term borrowings		$ 221	$ 595
FHLB of Boston long-term borrowings, percentage		1.84%	1.84%
2023
Federal Home Loan Bank Advances [Line Items]
FHLB of Boston long-term borrowings	[1]	$ 16,221	$ 17,240
FHLB of Boston long-term borrowings, percentage	[1]	3.69%	3.61%

[1] Includes a $15 million advance with an interest rate of 3.80%, that is callable by the FHLB of Boston on January 27, 2022