SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)		Sep. 30, 2023		Jun. 30, 2023	Dec. 31, 2022		Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity		$ (170,064,000)		$ (177,426,000)	$ (166,388,000)		$ (155,518,000)	$ (174,690,000)	$ (211,455,000)
Allowance for credit losses		20,252,000	[1]	20,172,000	19,659,000	[1]	18,631,000	17,485,000	21,025,000
Unfunded Loan Commitment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		1,054,000		1,041,000	0		0	0	0
Commercial Mortgages
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		11,025,000		10,994,000	11,576,000		10,986,000	10,314,000	13,556,000
Consumer Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses		3,213,000		3,152,000	2,865,000		2,334,000	1,893,000	2,075,000
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity		$ (227,596,000)		(221,412,000)	(211,859,000)		$ (205,874,000)	(200,870,000)	(188,877,000)
Cumulative effect adjustment for the adoption of ASC 326
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity	[2]				1,076,000
Allowance for credit losses					374,000
Cumulative effect adjustment for the adoption of ASC 326 | Unfunded Loan Commitment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses				$ 0	1,082,000			$ 0	$ 0
Cumulative effect adjustment for the adoption of ASC 326 | Loan Portfolio
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses					400,000
Cumulative effect adjustment for the adoption of ASC 326 | Securities Portfolio
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses					0
Cumulative effect adjustment for the adoption of ASC 326 | Commercial Mortgages
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses					(695,000)
Cumulative effect adjustment for the adoption of ASC 326 | Commercial Mortgages | Commercial And Agricultural And Commercial Real Estate
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses					200,000
Cumulative effect adjustment for the adoption of ASC 326 | Consumer Loans
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Allowance for credit losses					176,000
Cumulative effect adjustment for the adoption of ASC 326 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Stockholders' equity, before tax					1,500,000
Stockholders' equity	[2]				$ 1,076,000

[1] Effective January 1, 2023, the allowance calculation is based upon Current Expected Credit loss methodology. Prior to January 1, 2023, the allowance calculation was based upon incurred loss methodology. Refer to Note 1 for further discussion.

[2] Due to implementation of ASC 326. See "Adoption of New Accounting Standards" discussion in Note 1.