EQUITY, SHARE-BASED COMPENSATION, WARRANTS AND SECURITIES OFFERINGS, Options (Details) $ / shares in Units, $ in Thousands		1 Months Ended	12 Months Ended
		Jan. 31, 2020 Installment $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018 USD ($) $ / shares shares	Dec. 31, 2017 $ / shares shares
Options, Weighted Average Remaining Contractual Life [Abstract]
Cash exercised	[1]			8 years 7 months 6 days
Employees [Member] | Subsequent Event [Member]
Options, Weighted Average Exercise Price [Roll Forward]
Cash exercised (in dollars per share)		$ 1.23
Weighted-average assumptions used in valuing stock options [Abstract]
Exercise price of stock options (in dollars per share)		1.23
Weighted average grant date fair value of stock options (in dollars per share)		$ 1.26
Number of equal annual installments | Installment		4
Common Stock [Member]
Shares Under Options, Outstanding [Roll Forward]
Cash exercised (in shares) | shares			(165,812)	(32,500)
Maximum [Member] | Employees [Member] | Subsequent Event [Member]
Shares Under Options, Outstanding [Roll Forward]
Granted (in shares) | shares		591,004
Stock Options [Member]
Shares Under Options, Outstanding [Roll Forward]
Outstanding at beginning of period (in shares) | shares		996,009	950,727	639,659
Granted (in shares) | shares	[2]		385,883	653,873
Cash exercised (in shares) | shares	[1]		(165,812)	(32,500)
Forfeited (in shares) | shares			(174,789)	(310,305)
Outstanding at end of period (in shares) | shares			996,009	950,727	639,659
Options, Weighted Average Exercise Price [Roll Forward]
Outstanding at beginning of period (in dollars per share)		$ 3.23	$ 3.06	$ 2.91
Granted (in dollars per share)	[2]		3.01	2.25
Cash exercised (in dollars per share)	[1]		0.94	0.85
Forfeited (in dollars per share)			3.98	1.28
Outstanding at end of period (in dollars per share)			3.23	3.06	$ 2.91
Options, Weighted Average Grant Date Fair Value [Abstract]
Granted (in dollars per share)	[2]		$ 1.83	$ 1.50
Options, Weighted Average Remaining Contractual Life [Abstract]
Outstanding, weighted average remaining contractual life			8 years 1 month 6 days	8 years 6 months	8 years 6 months
Granted	[2]		10 years	10 years
Cash exercised	[1]		8 years 1 month 6 days
Forfeited			8 years 4 months 24 days	8 years 6 months
Options exercisable period			4 years
incremental expense | $			$ 100
Weighted-average assumptions used in valuing stock options [Abstract]
Assumed volatility, minimum			64.00%	75.00%
Assumed volatility, maximum			69.00%	81.00%
Assumed volatility, weighted average			67.00%	78.00%
Assumed risk free interest rate, minimum			1.80%	2.20%
Assumed risk free interest rate, maximum			2.70%	2.50%
Assumed risk free interest rate, weighted average			2.40%	2.50%
Average expected life of options				6 years 2 months 12 days
Expected dividends | $			$ 0	$ 0
Exercise price of stock options (in dollars per share)	[1]		$ 0.94	$ 0.85
Stock Options [Member] | Common Stock [Member]
Shares Under Options, Outstanding [Roll Forward]
Cash exercised (in shares) | shares			(31,955)
Options, Weighted Average Exercise Price [Roll Forward]
Cash exercised (in dollars per share)			$ 1.16
Weighted-average assumptions used in valuing stock options [Abstract]
Exercise price of stock options (in dollars per share)			$ 1.16
Stock Options [Member] | Weighted Average [Member]
Weighted-average assumptions used in valuing stock options [Abstract]
Average expected life of options			6 years 2 months 12 days	6 years 2 months 12 days
Stock Options [Member] | Minimum [Member]
Weighted-average assumptions used in valuing stock options [Abstract]
Average expected life of options			6 years 1 month 6 days
Stock Options [Member] | Maximum [Member]
Weighted-average assumptions used in valuing stock options [Abstract]
Average expected life of options			6 years 3 months 18 days

[1] Includes options for 31,955 shares of common stock at a weighted average exercise price of $1.16 per share for which we accelerated vesting upon termination of employment for an employee in June 2019. We expensed $0.1 million of incremental expense upon acceleration of vesting.

[2] The options granted vest and become exercisable in annual or monthly installments ending four years from the date of grant.