SECURITIES - Composition of Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Amortized cost (1)
Available-for-sale
U.S. Treasury notes	$ 2,499	$ 2,699
U.S. Government Agency notes	498	5,850
Municipal bonds	29,752	38,962
Mortgage backed securities, U.S. Government agencies and U.S. Government-sponsored enterprises	31,900	27,036
Collateralized mortgage obligations, U.S. Government agencies	2,002	2,657
Collateralized mortgage obligations, Non-agency	4,487	6,056
SBA bonds	3,065	4,336
CRA mutual funds	766	502
Preferred Stock	20	20
Total securities available-for-sale	74,989	88,118
Non-marketable securities
Federal Home Loan Bank of Boston stock	3,176	3,515
Gross unrealized gains
Available-for-sale
U.S. Treasury notes	$ 42	107
U.S. Government Agency notes		24
Municipal bonds	$ 633	1,455
Mortgage backed securities, U.S. Government agencies and U.S. Government-sponsored enterprises	385	688
Collateralized mortgage obligations, U.S. Government agencies	12	22
Collateralized mortgage obligations, Non-agency	468	552
SBA bonds	$ 31	129
CRA mutual funds		2
Preferred Stock	$ 226	307
Total securities available-for-sale	$ 1,797	$ 3,286
Non-marketable securities
Federal Home Loan Bank of Boston stock
Gross unrealized losses
Available-for-sale
U.S. Treasury notes
U.S. Government Agency notes
Municipal bonds		$ (65)
Mortgage backed securities, U.S. Government agencies and U.S. Government-sponsored enterprises	$ (83)	$ (15)
Collateralized mortgage obligations, U.S. Government agencies
Collateralized mortgage obligations, Non-agency	$ (7)	$ (12)
SBA bonds
CRA mutual funds	$ (2)
Preferred Stock
Total securities available-for-sale	$ (92)	$ (92)
Non-marketable securities
Federal Home Loan Bank of Boston stock
Fair value
Available-for-sale
U.S. Treasury notes	$ 2,541	$ 2,806
U.S. Government Agency notes	498	5,874
Municipal bonds	30,385	40,352
Mortgage backed securities, U.S. Government agencies and U.S. Government-sponsored enterprises	32,202	27,709
Collateralized mortgage obligations, U.S. Government agencies	2,014	2,679
Collateralized mortgage obligations, Non-agency	4,948	6,596
SBA bonds	3,096	4,465
CRA mutual funds	764	504
Preferred Stock	246	327
Total securities available-for-sale	76,694	91,312
Non-marketable securities
Federal Home Loan Bank of Boston stock	$ 3,176	$ 3,515

Investments in notes or bonds that are collateralized by a specific group of underlying assets owned by the issuer of the notes or bonds which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash Equivalents
-URI http://asc.fasb.org/extlink&oid=6507016

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (b)
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Amount of securities, mortgage loans, or other financial instruments pledged as collateral for deposits.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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Amount of Federal Home Loan Bank (FHLB) and Federal Reserve Bank stock.

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For an unclassified balance sheet, this item represents investments in common and preferred stocks and other forms of securities that provide ownership interests in a corporation.

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Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Fair value of securitized, pay-through debt securities collateralized by real estate mortgage loans classified as available-for-sale.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Bonds or similar securities issued by state, city, or local governments or the agencies operated by state, city, or local governments which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Carrying value as of the balance sheet date of the portion of long-term, collateralized debt obligations due within one year or the operating cycle, if longer. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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Debt securities issued by a United States government agency such as Government National Mortgage Association (Ginnie Mae), Federal Home Loan Mortgage Corporation (Freddie Mac), and Federal National Mortgage Association (Fannie Mae), which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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Debt (bills, notes or bonds) that are issued by the government of the United States which are short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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