EQUITY AWARDS - Schedule of Nonvested Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 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)	23,000	19,000
Vested (in shares)	(8,200)	(7,000)
Forfeited (in shares)	(23,200)	(16,400)
Balance (in shares)	242,720	327,160	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)	29.00	29.80
Vested (in USD per share)	27.45	27.13
Forfeited (in USD per share)	33.36	28.90
Balance (in USD per share)	$ 27.94	$ 27.81	$ 28.18	$ 27.74
Weighted-Average Remaining Contractual Life in Years
Outstanding	7 years 2 months 8 days	7 years 7 months 9 days	7 years 3 months 21 days	7 years 9 months 7 days
Granted	9 years 10 months 2 days	9 years 10 months 24 days
Vested	7 years 2 months 8 days	7 years 9 months 21 days
Forfeited	8 years 10 months 24 days	8 years 5 months 26 days
Aggregate Intrinsic Value
Outstanding	$ 1,188	$ 975	$ 975
Granted	11	0
Vested	0	22
Forfeited	0	27
Outstanding	$ 13	$ 807	$ 1,188	$ 975