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, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Numerator:
Net earnings (basic)	$ 3,976	$ 2,500	$ 7,492	$ 5,177
Net earnings (diluted)	$ 3,976	$ 2,500	$ 7,492	$ 5,177
Denominator:
Weighted-average shares outstanding (basic) (in shares)	10,019,049	9,257,995	9,388,998	9,113,023
Effect of dilutive securities:
Common stock equivalent shares from stock options (in shares)	87,776	9,647	60,273	9,647
Weighted-average shares outstanding (diluted) (in shares)	10,106,825	9,267,642	9,449,271	9,122,670
Net earnings per share
Basic (in USD per share)	$ 0.40	$ 0.27	$ 0.80	$ 0.57
Diluted (in USD per share)	$ 0.39	$ 0.27	$ 0.79	$ 0.57