EQUITY AWARDS - Schedule of Nonvested Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Outstanding at beginning of year (in shares)	251,120	331,560	331,560
Granted (in shares)	35,000	23,000
Vested (in shares)	(35,740)	(37,940)
Forfeited (in shares)	(23,200)	(16,400)
Balance (in shares)	227,180	300,220	251,120	331,560
Weighted-Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 28.18	$ 27.74	$ 27.74
Granted (in USD per share)	27.64	29.77
Vested (in USD per share)	26.74	27.28
Forfeited (in USD per share)	31.93	30.49
Balance (in USD per share)	$ 27.96	$ 27.89	$ 28.18	$ 27.74
Weighted-Average Remaining Contractual Life in Years
Outstanding	7 years 2 months 1 day	7 years 4 months 17 days	7 years 3 months 21 days	7 years 9 months 7 days
Granted	9 years 8 months 19 days	9 years 8 months 8 days
Vested	6 years 6 months 3 days	7 years 6 months 14 days
Forfeited	8 years 1 month 28 days	8 years 8 months 15 days
Aggregate Intrinsic Value
Outstanding	$ 1,188	$ 975	$ 975
Granted	41	32
Vested	36	163
Forfeited	0	52
Outstanding	$ 170	$ 1,087	$ 1,188	$ 975