EARNINGS PER SHARE - (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Shares
Basic (in shares)	18,158	17,937
Effect of dilutive stock options (in shares)	716	682
Diluted (in shares)	18,874	18,619
Per Share Amount
Basic (in dollars per share)	$ 0.11	$ 0.39
Effect of dilutive stock options (in dollars per share)		(0.01)
Diluted (in dollars per share)	$ 0.11	$ 0.38