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LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Impaired Financing Receivables (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	$ 25,000	$ 26,000
Unpaid Principal Balance with specific reserves	36,000	36,000
Interest Income Recognized with specific reserves	1,000	2,000
Specific Reserve with specific reserves	11,000	10,000
Average Recorded Investment	49,000	49,000
Recorded Investment with no specific reserve	166,000	301,000
Unpaid Principal Balance with no specific reserve	166,000	301,000
Interest Income Recognized with no specific reserve	2,000	12,000
Average Recorded Investment with no specific reserve	189,000	350,000
Real Estate Loan
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	25,000	26,000
Unpaid Principal Balance with specific reserves	36,000	36,000
Interest Income Recognized with specific reserves	1,000	2,000
Specific Reserve with specific reserves	11,000	10,000
Average Recorded Investment	49,000	49,000
Recorded Investment with no specific reserve	46,000	87,000
Unpaid Principal Balance with no specific reserve	46,000	87,000
Interest Income Recognized with no specific reserve	0	3,000
Average Recorded Investment with no specific reserve	51,000	98,000
Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment with no specific reserve		71,000
Unpaid Principal Balance with no specific reserve		71,000
Interest Income Recognized with no specific reserve		1,000
Average Recorded Investment with no specific reserve		71,000
Consumer Loans
Financing Receivable, Impaired [Line Items]
Recorded Investment with no specific reserve	120,000	143,000
Unpaid Principal Balance with no specific reserve	120,000	143,000
Interest Income Recognized with no specific reserve	2,000	8,000
Average Recorded Investment with no specific reserve	138,000	181,000
Single-family | Real Estate Loan
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	25,000	26,000
Unpaid Principal Balance with specific reserves	36,000	36,000
Interest Income Recognized with specific reserves	1,000	2,000
Specific Reserve with specific reserves	11,000	10,000
Average Recorded Investment	49,000	49,000
Recorded Investment with no specific reserve	46,000	87,000
Unpaid Principal Balance with no specific reserve	46,000	87,000
Interest Income Recognized with no specific reserve	0	3,000
Average Recorded Investment with no specific reserve	51,000	98,000
Single-family | Consumer Loans
Financing Receivable, Impaired [Line Items]
Unpaid Principal Balance with specific reserves	35,616
Specific Reserve	10,954
SBA Guaranty | Commercial and Industrial
Financing Receivable, Impaired [Line Items]
Recorded Investment with no specific reserve		71,000
Unpaid Principal Balance with no specific reserve		71,000
Interest Income Recognized with no specific reserve		1,000
Average Recorded Investment with no specific reserve		71,000
Automobile | Consumer Loans
Financing Receivable, Impaired [Line Items]
Recorded Investment with no specific reserve	120,000	143,000
Unpaid Principal Balance with no specific reserve	120,000	143,000
Interest Income Recognized with no specific reserve	2,000	8,000
Average Recorded Investment with no specific reserve	$ 138,000	$ 181,000

X

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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