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INVESTMENT SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2017
Investments [Abstract] |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] | ## The cost basis and fair values of investment securities are summarized as follows: Investment securities available for sale:
|  | AT DECEMBER 31, 2017
|  | COST BASIS |  | GROSS UNREALIZED GAINS |  | GROSS UNREALIZED LOSSES |  | FAIR VALUE
|  | (IN THOUSANDS)
U.S. Agency |  | $ | 6,612 |  |  | $ | — |  |  | $ | (40 | ) |  | $ | 6,572 |
Taxable municipal |  |  | 7,198 |  |  |  | 27 |  |  |  | (189 | ) |  |  | 7,036 |
Corporate bonds |  |  | 35,886 |  |  |  | 322 |  |  |  | (424 | ) |  |  | 35,784 |
U.S. Agency mortgage-backed securities |  |  | 79,854 |  |  |  | 611 |  |  |  | (719 | ) |  |  | 79,746 |
Total |  | $ | 129,550 |  |  | $ | 960 |  |  | $ | (1,372 | ) |  | $ | 129,138 |
Investment securities held to maturity:
|  | AT DECEMBER 31, 2017
|  | COST BASIS |  | GROSS UNREALIZED GAINS |  | GROSS UNREALIZED LOSSES |  | FAIR VALUE
|  | (IN THOUSANDS)
U.S. Agency mortgage-backed securities |  | $ | 9,740 |  |  | $ | 149 |  |  | $ | (45 | ) |  | $ | 9,844 |
Taxable municipal |  |  | 22,970 |  |  |  | 203 |  |  |  | (238 | ) |  |  | 22,935 |
Corporate bonds and other securities |  |  | 6,042 |  |  |  | 38 |  |  |  | (48 | ) |  |  | 6,032 |
Total |  | $ | 38,752 |  |  | $ | 390 |  |  | $ | (331 | ) |  | $ | 38,811 |
Investment securities available for sale:
|  | AT DECEMBER 31, 2016
|  | COST BASIS |  | GROSS UNREALIZED GAINS |  | GROSS UNREALIZED LOSSES |  | FAIR VALUE
|  | (IN THOUSANDS)
U.S. Agency |  | $ | 400 |  |  | $ | — |  |  | $ | (2 | ) |  | $ | 398 |
Taxable municipal |  |  | 3,793 |  |  |  | 3 |  |  |  | (174 | ) |  |  | 3,622 |
Corporate bonds |  |  | 34,403 |  |  |  | 194 |  |  |  | (724 | ) |  |  | 33,873 |
U.S. Agency mortgage-backed securities |  |  | 88,738 |  |  |  | 1,132 |  |  |  | (686 | ) |  |  | 89,184 |
Total |  | $ | 127,334 |  |  | $ | 1,329 |  |  | $ | (1,586 | ) |  | $ | 127,077 |
Investment securities held to maturity:
|  | AT DECEMBER 31, 2016
|  | COST BASIS |  | GROSS UNREALIZED GAINS |  | GROSS UNREALIZED LOSSES |  | FAIR VALUE
|  | (IN THOUSANDS)
U.S. Agency mortgage-backed securities |  | $ | 11,177 |  |  | $ | 180 |  |  | $ | (79 | ) |  | $ | 11,278 |
Taxable municipal |  |  | 13,441 |  |  |  | 70 |  |  |  | (348 | ) |  |  | 13,163 |
Corporate bonds and other securities |  |  | 6,047 |  |  |  | 15 |  |  |  | (83 | ) |  |  | 5,979 |
Total |  | $ | 30,665 |  |  | $ | 265 |  |  | $ | (510 | ) |  | $ | 30,420 |
Schedule of Contractual Maturities of Securities [Table Text Block] | Investment securities available for sale:
|  | AT DECEMBER 31, 2017
|  | U.S. AGENCY |  | U.S. AGENCY MORTGAGE- BACKED SECURITIES |  | CORPORATE BONDS AND OTHER |  | TOTAL INVESTMENT SECURITIES AVAILABLE FOR SALE
|  | (IN THOUSANDS, EXCEPT YIELDS)
COST BASIS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Within 1 year |  | $ | 400 |  |  |  | 1.03 | % |  | $ | 1 |  |  |  | 6.00 | % |  | $ | — |  |  |  | —% |  |  | $ | 401 |  |  |  | 1.04 | %
After 1 year but within 5 years |  |  | — |  |  |  | — |  |  |  | 848 |  |  |  | 2.09 |  |  |  | 10,938 |  |  |  | 2.99 |  |  |  | 11,786 |  |  |  | 2.93 |
After 5 years but within 10 years |  |  | 3,230 |  |  |  | 2.75 |  |  |  | 14,623 |  |  |  | 2.91 |  |  |  | 30,646 |  |  |  | 3.64 |  |  |  | 48,499 |  |  |  | 3.36 |
After 10 years but within 15 years |  |  | — |  |  |  | — |  |  |  | 24,516 |  |  |  | 2.30 |  |  |  | 1,500 |  |  |  | 3.98 |  |  |  | 26,016 |  |  |  | 2.39 |
Over 15 years |  |  | 2,982 |  |  |  | 2.69 |  |  |  | 39,866 |  |  |  | 2.52 |  |  |  | — |  |  |  | — |  |  |  | 42,848 |  |  |  | 2.53 |
Total |  | $ | 6,612 |  |  |  | 2.62 |  |  | $ | 79,854 |  |  |  | 2.52 |  |  | $ | 43,084 |  |  |  | 3.49 |  |  | $ | 129,550 |  |  |  | 2.84 |
FAIR VALUE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Within 1 year |  | $ | 399 |  |  |  |  |  |  | $ | 1 |  |  |  |  |  |  | $ | — |  |  |  |  |  |  | $ | 400 |  |  |  |  |
After 1 year but within 5 years |  |  | — |  |  |  |  |  |  |  | 843 |  |  |  |  |  |  |  | 10,924 |  |  |  |  |  |  |  | 11,767 |  |  |  |  |
After 5 years but within 10 years |  |  | 3,220 |  |  |  |  |  |  |  | 14,859 |  |  |  |  |  |  |  | 30,477 |  |  |  |  |  |  |  | 48,556 |  |  |  |  |
After 10 years but within 15 years |  |  | — |  |  |  |  |  |  |  | 24,301 |  |  |  |  |  |  |  | 1,419 |  |  |  |  |  |  |  | 25,720 |  |  |  |  |
Over 15 years |  |  | 2,953 |  |  |  |  |  |  |  | 39,742 |  |  |  |  |  |  |  | — |  |  |  |  |  |  |  | 42,695 |  |  |  |  |
Total |  | $ | 6,572 |  |  |  |  |  |  | $ | 79,746 |  |  |  |  |  |  | $ | 42,820 |  |  |  |  |  |  | $ | 129,138 |  |  |  |  |
Investment securities held to maturity:
|  | AT DECEMBER 31, 2017
|  | U.S. AGENCY MORTGAGE- BACKED SECURITIES |  | CORPORATE BONDS AND OTHER |  | TOTAL INVESTMENT SECURITIES HELD TO MATURITY
|  | (IN THOUSANDS, EXCEPT YIELDS)
COST BASIS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Within 1 year |  | $ | — |  |  |  | —% |  |  | $ | 2,000 |  |  |  | 1.78 | % |  | $ | 2,000 |  |  |  | 1.78 | %
After 1 year but within 5 years |  |  | 688 |  |  |  | 2.11 |  |  |  | 1,751 |  |  |  | 2.29 |  |  |  | 2,439 |  |  |  | 2.24 |
After 5 years but within 10 years |  |  | 2,081 |  |  |  | 2.49 |  |  |  | 12,797 |  |  |  | 3.57 |  |  |  | 14,878 |  |  |  | 3.42 |
After 10 years but within 15 years |  |  | 2,604 |  |  |  | 3.30 |  |  |  | 11,643 |  |  |  | 3.64 |  |  |  | 14,247 |  |  |  | 3.58 |
Over 15 years |  |  | 4,367 |  |  |  | 3.07 |  |  |  | 821 |  |  |  | 4.75 |  |  |  | 5,188 |  |  |  | 3.34 |
Total |  | $ | 9,740 |  |  |  | 2.94 |  |  | $ | 29,012 |  |  |  | 3.43 |  |  | $ | 38,752 |  |  |  | 3.31 |
FAIR VALUE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Within 1 year |  | $ | — |  |  |  |  |  |  | $ | 1,976 |  |  |  |  |  |  | $ | 1,976 |  |  |  |  |
After 1 year but within 5 years |  |  | 677 |  |  |  |  |  |  |  | 1,734 |  |  |  |  |  |  |  | 2,411 |  |  |  |  |
After 5 years but within 10 years |  |  | 2,075 |  |  |  |  |  |  |  | 12,815 |  |  |  |  |  |  |  | 14,890 |  |  |  |  |
After 10 years but within 15 years |  |  | 2,685 |  |  |  |  |  |  |  | 11,597 |  |  |  |  |  |  |  | 14,282 |  |  |  |  |
Over 15 years |  |  | 4,407 |  |  |  |  |  |  |  | 845 |  |  |  |  |  |  |  | 5,252 |  |  |  |  |
Total |  | $ | 9,844 |  |  |  |  |  |  | $ | 28,967 |  |  |  |  |  |  | $ | 38,811 |  |  |
Schedule of Unrealized Loss on Investments [Table Text Block] | The following tables present information concerning investments with unrealized losses as of December 31, 2017 (in thousands):
Total investment securities: |  | LESS THAN 12 MONTHS |  | 12 MONTHS OR LONGER |  | TOTAL
| FAIR VALUE |  | UNREALIZED LOSSES |  | FAIR VALUE |  | UNREALIZED LOSSES |  | FAIR VALUE |  | UNREALIZED LOSSES
U.S. Agency |  | $ | 5,923 |  |  | $ | (39 | ) |  | $ | 399 |  |  | $ | (1) |  |  | $ | 6,322 |  |  | $ | (40 | )
U.S. Agency mortgage-backed securities |  |  | 36,783 |  |  |  | (253 | ) |  |  | 22,625 |  |  |  | (511 | ) |  |  | 59,408 |  |  |  | (764 | )
Taxable municipal |  |  | 8,657 |  |  |  | (109 | ) |  |  | 7,727 |  |  |  | (318 | ) |  |  | 16,384 |  |  |  | (427 | )
Corporate bonds and other securities |  |  | 7,123 |  |  |  | (71 | ) |  |  | 13,655 |  |  |  | (401 | ) |  |  | 20,778 |  |  |  | (472 | )
Total |  | $ | 58,486 |  |  | $ | (472 | ) |  | $ | 44,406 |  |  | $ | (1,231 | ) |  | $ | 102,892 |  |  | $ | (1,703 | )
The following tables present information concerning investments with unrealized losses as of December 31, 2016 (in thousands):
Total investment securities: |  | LESS THAN 12 MONTHS |  | 12 MONTHS OR LONGER |  | TOTAL
| FAIR VALUE |  | UNREALIZED LOSSES |  | FAIR VALUE |  | UNREALIZED LOSSES |  | FAIR VALUE |  | UNREALIZED LOSSES
U.S. Agency |  | $ | 398 |  |  | $ | (2 | ) |  | $ | — |  |  | $ | — |  |  | $ | 398 |  |  | $ | (2 | )
U.S. Agency mortgage-backed securities |  |  | 49,918 |  |  |  | (703 | ) |  |  | 1,576 |  |  |  | (62 | ) |  |  | 51,494 |  |  |  | (765 | )
Taxable municipal |  |  | 13,301 |  |  |  | (522 | ) |  |  | — |  |  |  | — |  |  |  | 13,301 |  |  |  | (522 | )
Corporate bonds and other securities |  |  | 20,380 |  |  |  | (570 | ) |  |  | 6,762 |  |  |  | (237 | ) |  |  | 27,142 |  |  |  | (807 | )
Total |  | $ | 83,997 |  |  | $ | (1,797 | ) |  | $ | 8,338 |  |  | $ | (299 | ) |  | $ | 92,335 |  |  | $ | (2,096 | )

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