18. PARENT ONLY CONDENSED FINANCIAL STATEMENTS - CONSOLIDATED STATEMENTS OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flows from operating activities:
Net income	$ 3,198	$ 6,404	$ 5,268
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Equity-based compensation expense	273	331	271
Increase in other assets	537	(1,734)	723
Net cash provided by operating activities	7,531	9,865	8,777
Cash flows from investing activities:
Purchases of equipment	(129)	(375)	(319)
Net cash provided by investing activities	1,656	(17,218)	(19,653)
Cash flows from financing activities:
Proceeds from exercised options	351	13	0
Cash paid to repurchase common stock	(8,641)	(7,414)	(7,843)
Net cash used in financing activities	1,691	11,215	12,154
Net increase (decrease) in cash and cash equivalents	10,878	3,862	1,278
Cash and cash equivalents at beginning of year	27,589	23,727	22,449
Cash and cash equivalents at end of year	38,467	27,589	23,727
Parent Company [Member]
Cash flows from operating activities:
Net income	3,198	6,404	5,268
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Distributed (undistributed) earnings of subsidiaries	8,852	2,088	2,287
Equity-based compensation expense	273	331	271
Increase in other assets	(2,686)	(1,393)	(206)
Increase in other liabilities	(1)	39	36
Net cash provided by operating activities	9,636	7,469	7,656
Cash flows from financing activities:
Proceeds from exercised options	351	13	0
Cash paid to repurchase common stock	(8,641)	(7,414)	(7,843)
Net cash used in financing activities	(8,290)	(7,401)	(7,843)
Net increase (decrease) in cash and cash equivalents	1,346	68	(187)
Cash and cash equivalents at beginning of year	259	191	378
Cash and cash equivalents at end of year	$ 1,605	$ 259	$ 191