EARNINGS PER SHARE - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net earnings (basic)	$ 1,075	$ 6,043	$ 7,353	$ 11,380
Net earnings (diluted)	$ 1,075	$ 6,043	$ 7,353	$ 11,380
Denominator:
Weighted-average shares outstanding (basic) (in shares)	11,025,924	11,659,513	11,229,158	11,737,307
Effect of dilutive securities:
Common stock equivalent shares from stock options (in shares)		70,545		57,093
Weighted-average shares outstanding (diluted) (in shares)	11,025,924	11,730,058	11,229,158	11,794,400
Net earnings per share
Basic (in USD per share)	$ 0.10	$ 0.52	$ 0.65	$ 0.97
Diluted (in USD per share)	$ 0.10	$ 0.52	$ 0.65	$ 0.97