STOCK PLANS, Stock Options (Details) - Stock Options [Member] - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Stock options, number of shares [Roll Forward]
Balance, beginning of period (in shares)	260,592
Granted (in shares)	69,868
Expired (in shares)	(3,412)
Cancelled / Forfeited (in shares)	0
Exercised (in shares)	(13,539)
Balance, end of period (in shares)	313,509
Exercisable (vested) at end of period (in shares)	154,508
Stock options, weighted average exercise price [Roll Forward]
Balance, beginning of period (in dollars per share)	$ 7.42
Granted (in dollars per share)	13.03
Expired (in dollars per share)	11.90
Cancelled / Forfeited (in dollars per share)	0
Exercised (in dollars per share)	7.05
Balance, end of period (in dollars per share)	8.64
Exercisable (vested) at end of period (in dollars per share)	$ 6.32
Stock options, additional disclosures [Abstract]
Outstanding, aggregate intrinsic value	$ 1,488,836
Exercisable (vested), aggregate intrinsic value	$ 1,091,848
Outstanding, weighted average remaining contractual term	7 years 6 months 7 days
Exercisable (vested), weighted average remaining contractual term	6 years 7 days
Weighted average fair value of options granted (in dollars per share)	$ 2.48
Intrinsic value of options exercised	$ 88,000	$ 0
Fair value of awards vested	114,000	$ 85,000
Unrecognized compensation related to non-vested stock options	$ 368,000
Unrecognized compensation cost, period for recognition	2 years 11 months 8 days
Recognized compensation cost	$ 33,000
Weighted average assumptions used in valuation [Abstract]
Risk free interest rate	2.57%
Expected dividend yield	0.00%
Expected life	5 years
Expected price volatility	14.44%