STOCK OPTIONS - Schedule of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Number of Shares
Beginning balance (in shares)	340,377	314,391	314,391
Granted (in shares)	109,200	26,500
Exercised (in shares)	(7,033)
Forfeited (in shares)	(6,000)	(17,400)
Ending balance (in shares)	436,544	323,491	340,377	314,391
Weighted-Average Exercise Price
Beginning balance (in USD per share)	$ 23.43	$ 23.28	$ 23.28
Granted (in USD per share)	27.00	23.21
Exercised (in USD per share)	11.94
Forfeited (in USD per share)	23.17	23.17
Ending balance (in USD per share)	$ 24.51	$ 23.28	$ 23.43	$ 23.28
Weighted-Average Remaining Contractual Life in Years
Outstanding	7 years 7 months 17 days	7 years 7 months 17 days	7 years 4 months 2 days	8 years
Granted	9 years 10 months 24 days	9 years 7 months 2 days
Exercised	4 years 8 months 23 days
Forfeited	7 years 4 months 17 days	8 years 4 months 13 days
Aggregate Intrinsic Value
Outstanding	$ 3,277	$ 232	$ 194	$ 225
Granted	548	21
Exercised	141
Forfeited	$ 53	$ 14
Exercisable
Outstanding (in shares)	117,484	58,891
Weighted-average exercise price (in USD per share)	$ 24.11	$ 21.25
Weighted-average remaining contractual life in years	7 years 4 days	6 years 9 months 15 days
Aggregate intrinsic value	$ 930	$ 162