11. FAIR VALUE MEASUREMENTS - Carrying amounts and estimated fair values (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Financial assets:
Cash and due from banks	$ (24,634)	$ (38,467)
Federal funds sold	(10,000)	0
Interest-bearing deposits in banks	1,746	1,746
Available-for-sale securities	277,269	262,322
Held-to-maturity securities	328	404
FHLB stock	3,932	3,932
Net loans and leases:	306,226	317,900
Accrued interest receivable	1,919	1,956
Deposits:
Noninterest-bearing	209,322	215,528
Savings	74,765	66,130
Money market	150,050	130,032
NOW accounts	64,682	64,709
Time Deposits	76,687	79,614
Short-term borrowings	6,500	3,500
Long-term borrowings	9,124	11,978
Accrued interest payable	69	65
Carrying Amount
Financial assets:
Cash and due from banks	24,634	38,467
Federal funds sold	10,000
Interest-bearing deposits in banks	1,746	1,746
Available-for-sale securities	277,269	262,322
Held-to-maturity securities	311	378
FHLB stock	3,932	3,932
Net loans and leases:	310,322	308,713
Accrued interest receivable	1,919	1,956
Deposits:
Noninterest-bearing	209,322	215,528
Savings	74,765	66,130
Money market	150,050	130,032
NOW accounts	64,682	64,709
Time Deposits	77,001	79,681
Short-term borrowings	6,500	3,500
Long-term borrowings	9,000	12
Accrued interest payable	69	65
Level 1
Financial assets:
Cash and due from banks	24,634	38,467
Federal funds sold	10,000
Interest-bearing deposits in banks	0	0
Available-for-sale securities	4,963	66
Held-to-maturity securities	0	0
FHLB stock	0	0
Net loans and leases:	0	0
Accrued interest receivable	0	0
Deposits:
Noninterest-bearing	209,322	215,528
Savings	74,765	66,130
Money market	150,050	130,032
NOW accounts	64,682	64,709
Time Deposits	0	0
Short-term borrowings	6,500	3,500
Long-term borrowings	0	0
Accrued interest payable	7	4
Level 2
Financial assets:
Cash and due from banks	0	0
Federal funds sold	0
Interest-bearing deposits in banks	1,746	1,750
Available-for-sale securities	273,306	262,256
Held-to-maturity securities	328	404
FHLB stock	0	0
Net loans and leases:	0	0
Accrued interest receivable	983	1,124
Deposits:
Noninterest-bearing	0	0
Savings	0	0
Money market	0	0
NOW accounts	0	0
Time Deposits	76,687	79,614
Short-term borrowings	0	0
Long-term borrowings	9,124	11,978
Accrued interest payable	62	61
Level 3
Financial assets:
Cash and due from banks	0	0
Federal funds sold	0
Interest-bearing deposits in banks	0	0
Available-for-sale securities	0	0
Held-to-maturity securities	0	0
FHLB stock	0	0
Net loans and leases:	306,226	317,900
Accrued interest receivable	936	832
Deposits:
Noninterest-bearing	0	0
Savings	0	0
Money market	0	0
NOW accounts	0	0
Time Deposits	0	0
Short-term borrowings	0	0
Long-term borrowings	0	0
Accrued interest payable	$ 0	$ 0