EMPLOYEE AND DIRECTOR BENEFIT PLANS - Stock options outstanding (Details)	12 Months Ended
	Dec. 31, 2019 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options outstanding, at end of year	268,542
Number of options exercisable, Outstanding at end of year	121,660
Excercise Price Range One [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options outstanding, at end of year	67,922
Number of options exercisable, Outstanding at end of year	62,920
Range of Exercise Prices, Lower Limit | $ / shares	$ 2.25
Range of Exercise Prices, Upper Limit | $ / shares	$ 7.07
Excercise Price Range Two [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options outstanding, at end of year	41,620
Number of options exercisable, Outstanding at end of year	18,040
Range of Exercise Prices, Lower Limit | $ / shares	$ 7.08
Range of Exercise Prices, Upper Limit | $ / shares	$ 10.69
Excercise Price Range Three [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Number of options outstanding, at end of year	159,000
Number of options exercisable, Outstanding at end of year	40,700
Range of Exercise Prices, Lower Limit | $ / shares	$ 10.70
Range of Exercise Prices, Upper Limit | $ / shares	$ 12.99