LOANS - Schedule of Nonaccrual Loans and Past-Due Loans (Detail) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017 |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | $ 610 | $ 124 |
Total Current | 215,084 | 220,691 |
Total | 215,694 | 220,815 |
90 Days or More Past Due and Accruing | 0 | 0 |
Nonaccrual Loans | 109 | 112 |
Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 37 | 12 |
Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 573 | 0 |
Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | 0 | 112 |
Commercial and industrial loans [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total | 3,010 | 2,802 |
Real Estate Loans [Member] | One-to four-family residential [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 567 | 112 |
Total Current | 137,109 | 143,301 |
Total | 137,676 | 143,413 |
90 Days or More Past Due and Accruing | 0 | 0 |
Nonaccrual Loans | 109 | 112 |
Real Estate Loans [Member] | One-to four-family residential [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Real Estate Loans [Member] | One-to four-family residential [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 567 | 0 |
Real Estate Loans [Member] | One-to four-family residential [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | 0 | 112 |
Real Estate Loans [Member] | Commercial [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Total Current | 24,316 | 24,360 |
Total | 24,316 | 24,360 |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Commercial [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Real Estate Loans [Member] | Commercial [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Real Estate Loans [Member] | Commercial [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Multi-family [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Total Current | 21,125 | 21,402 |
Total | 21,125 | 21,402 |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Multi-family [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Real Estate Loans [Member] | Multi-family [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Real Estate Loans [Member] | Multi-family [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Home equity loans and lines of credit [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 35 | 0 |
Total Current | 2,950 | 2,553 |
Total | 2,985 | 2,553 |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Home equity loans and lines of credit [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 29 | 0 |
Real Estate Loans [Member] | Home equity loans and lines of credit [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 6 | 0 |
Real Estate Loans [Member] | Home equity loans and lines of credit [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Construction [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Total Current | 25,702 | 25,279 |
Total | 25,702 | 25,279 |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Construction [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Real Estate Loans [Member] | Construction [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Real Estate Loans [Member] | Construction [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Commercial and industrial loans [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Total Current | 3,010 | 2,802 |
Total | 3,010 | 2,802 |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Commercial and industrial loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Real Estate Loans [Member] | Commercial and industrial loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Real Estate Loans [Member] | Commercial and industrial loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Consumer line of credit [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | 0 | 0 |
Real Estate Loans [Member] | Other consumer [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | | 0 |
Real Estate Loans [Member] | Other consumer [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
90 Days or More Past Due and Accruing | 0 | |
Consumer Loans [Member] | Commercial [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Nonaccrual Loans | 0 | 0 |
Consumer Loans [Member] | Multi-family [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Nonaccrual Loans | 0 | 0 |
Consumer Loans [Member] | Home equity loans and lines of credit [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Nonaccrual Loans | 0 | 0 |
Consumer Loans [Member] | Construction [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Nonaccrual Loans | 0 | 0 |
Consumer Loans [Member] | Commercial and industrial loans [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Nonaccrual Loans | 0 | 0 |
Consumer Loans [Member] | Consumer line of credit [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Total Current | 20 | 12 |
Total | 20 | 12 |
90 Days or More Past Due and Accruing | 0 | 0 |
Nonaccrual Loans | 0 | 0 |
Consumer Loans [Member] | Consumer line of credit [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Consumer Loans [Member] | Consumer line of credit [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 0 | 0 |
Consumer Loans [Member] | Other consumer [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 8 | 12 |
Total Current | 852 | 982 |
Total | 860 | 994 |
90 Days or More Past Due and Accruing | 0 | 0 |
Nonaccrual Loans | 0 | 0 |
Consumer Loans [Member] | Other consumer [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | 8 | 12 |
Consumer Loans [Member] | Other consumer [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | | |
Financing Receivable, Recorded Investment, Past Due [Line Items] | | |
Total Past Due | $ 0 | $ 0 |