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LOANS RECEIVABLE, NET - Aging analysis (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 1,287,609 | $ 1,284,073
60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 567 | 6,151
90 Days and Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 9,615 | 11,036
Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 10,182 | 17,187
Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 1,277,427 | 1,266,886
Residential Portfolio Segment | Residential one-to-four family |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 566,483 | 616,248
Residential Portfolio Segment | Residential one-to-four family | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 457 | 3,151
Residential Portfolio Segment | Residential one-to-four family | 90 Days and Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 8,936 | 10,075
Residential Portfolio Segment | Residential one-to-four family | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 9,393 | 13,226
Residential Portfolio Segment | Residential one-to-four family | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 557,090 | 603,022
Residential Portfolio Segment | Multifamily |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 516,568 | 429,095
Residential Portfolio Segment | Multifamily | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 0
Residential Portfolio Segment | Multifamily | 90 Days and Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 156
Residential Portfolio Segment | Multifamily | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 156
Residential Portfolio Segment | Multifamily | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 516,568 | 428,939
Non-residential | Non-residential |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 141,534 | 128,217
Non-residential | Non-residential | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 0
Non-residential | Non-residential | 90 Days and Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 381 | 805
Non-residential | Non-residential | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 381 | 805
Non-residential | Non-residential | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 141,153 | 127,412
Construction and land | Construction and land |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 23,420 | 33,630
Construction and land | Construction and land | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 3,000
Construction and land | Construction and land | 90 Days and Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 0
Construction and land | Construction and land | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 3,000
Construction and land | Construction and land | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 23,420 | 30,630
Junior liens | Junior liens |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 18,550 | 23,918
Junior liens | Junior liens | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 53 | 0
Junior liens | Junior liens | 90 Days and Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 182 | 0
Junior liens | Junior liens | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 235 | 0
Junior liens | Junior liens | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 18,315 | 23,918
Commercial and industrial (including PPP) | Commercial and industrial (including PPP) |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 20,966 | 52,867
Commercial and industrial (including PPP) | Commercial and industrial (including PPP) | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 57 | 0
Commercial and industrial (including PPP) | Commercial and industrial (including PPP) | 90 Days and Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 116 | 0
Commercial and industrial (including PPP) | Commercial and industrial (including PPP) | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 173 | 0
Commercial and industrial (including PPP) | Commercial and industrial (including PPP) | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 20,793 | 52,867
Consumer and other | Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 88 | 98
Consumer and other | Consumer and other | 60-89 Days Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 0
Consumer and other | Consumer and other | 90 Days and Greater Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 0
Consumer and other | Consumer and other | Total Past Due |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | 0 | 0
Consumer and other | Consumer and other | Current |  |
Financing Receivable, Past Due [Line Items] |  |
Total Loans Receivable | $ 88 | $ 98

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