INVESTMENTS - Narrative (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) security	Dec. 31, 2021 USD ($) security
Debt and Equity Securities, FV-NI [Line Items]
Held-to maturity securities with unrealized losses of less than one year | security	6
Held-to maturity securities with unrealized losses of more than one year | security	0
Held-to maturity securities with unrealized losses | security		0
Available-for-sale securities with unrealized losses of less than one year | security	148	75
Available-for-sale securities with unrealized losses of more than one year | security	39	17
Number of securities pledged and held at FHLB | security	7
Pledged securities to secure public deposits	$ 6,400,000
Public deposits	15,700,000
Other than temporary impairment losses, investments	0	$ 0
Accrued interest receivable on held to maturity debt securities	117,000	113,000
Accrued interest receivable on available-for-sale debt securities	1,200,000	$ 1,100,000
Debt securities classified as nonaccrual or 90 days or more past due and still accruing	0
Asset pledged as collateral | Washington Public Deposit Protection Commission
Debt and Equity Securities, FV-NI [Line Items]
Collateral requirement	$ 6,400,000