STOCKHOLDERS' EQUITY (Details) - USD ($)	1 Months Ended		12 Months Ended
	Nov. 30, 2018	Feb. 28, 2018	Dec. 31, 2019	Dec. 31, 2018
Common Stock [Abstract]
Number of stock options exercised under the plan (in shares)			54,343	144,947
Exercised (in shares)			31,543	71,290
Exercise prices of stock option, minimum (in dollars per share)			$ 3.48	$ 3.48
Exercise prices of stock option, maximum (in dollars per share)			4.35	$ 5.64
Underwritten public offering (in shares)	2,726,000	1,783,760
Underwritten exercise of overallotment (in shares)	355,565
Public offering price per share (in dollars per share)	$ 6.75	$ 6.75	$ 5.40
Net proceeds after underwriting discounts and other offering expenses	$ 16,500,000	$ 10,900,000	$ 0	$ 27,476,260
Preferred Stock [Abstract]
Preferred stock - shares authorized (in shares)			10,000,000	10,000,000
Preferred stock - shares outstanding (in shares)			0	0
Warrants [Abstract]
Warrants outstanding (in shares)			550,000