STOCK-BASED COMPENSATION (Stock Option Award Activity) (Details) - Common stock options - $ / shares	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Number of Options outstanding
Outstanding at the beginning of the year (in shares)			1,340,252
Granted (in shares)	50,500	62,000	60,500	102,000
Forfeited (in shares)			(225,992)
Outstanding at the end of the reporting period (in shares)	1,174,760		1,174,760		1,340,252
Number of Options Exercisable
Exercisable at the beginning of the year (in shares)			989,092
Vested (in shares)			(73,693)
Forfeited (in shares)			(107,958)
Exercisable at the end of the reporting period (in shares)	954,827		954,827		989,092
Weighted Average Exercise Price Outstanding
Outstanding at the beginning of period (in dollars per share)			$ 4.57
Granted (in dollars per share)			2.19
Forfeited (in dollars per share)			4.29
Outstanding at the end of the reporting period (in dollars per share)	$ 4.50		4.50		$ 4.57
Weighted Average Exercise Price Exercisable
Exercisable at the beginning of the reporting period (in dollars per share)			4.85
Vested exercisable (in dollars per share)			3.70
Forfeited (in dollars per share)			4.72
Exercisable at the end of the reporting period (in dollars per share)	4.78		4.78		4.85
Weighted Average Grant Date Fair Value Outstanding
Outstanding at the beginning of the reporting period (in dollars per share)			2.88
Granted (in dollars per share)			1.56
Forfeited (in dollars per share)			2.81
Outstanding at the end of the reporting period (in dollars per share)	2.83		2.83		2.88
Weighted Average Grant Date Fair Value Exercisable
Exercisable at the beginning of the reporting period (in dollars per share)			3.03
Vested options exercisable (in dollars per share)			2.36
Forfeited options exercisable (in dollars per share)			3.04
Exercisable at the end of the reporting period (in dollars per share)	$ 2.98		$ 2.98		$ 3.03
Weighted Average Remaining Life In Years Outstanding
Outstanding Weighted Average Remaining Life (in years)			6 years 11 days		6 years 11 months 12 days
Granted (in years)			9 years 10 months 6 days
Weighted Average Remaining Life Exercisable
Weighted Average Remaining Life In Years			5 years 4 months 24 days		6 years 4 months 13 days
Granted (in years)			5 years 5 months 9 days