COMPENSATION PLANS (Summary of Stock Option Activity) (Details) - Stock Options [Member]	12 Months Ended
	Dec. 31, 2019 USD ($) $ / shares shares
Stock option activity, number of shares
Outstanding non-qualified stock options, at beginning of period (in shares) | shares	3,351,684
Granted (in shares) | shares	0
Exercised (in shares) | shares	(20,745)
Forfeited (in shares) | shares	(69,372)
Expired (in Shares) | shares	(126,773)
Outstanding non-qualified stock options, at end of period (in shares) | shares	3,134,794
Vested or expected to vest, end of period (in shares) | shares	3,134,794
Exercisable non-qualified stock options, at end of period (in shares) | shares	1,388,702
Stock Options, Weighted Average Exercise Price
Outstanding non-qualified stock options, at beginning of period (in dollars per share) | $ / shares	$ 3.91
Granted (in dollars per share) | $ / shares	0.00
Exercised (in dollars per share) | $ / shares	1.03
Forfeited (in dollars per share) | $ / shares	1.35
Expired (in dollars per share) | $ / shares	22.03
Outstanding non-qualified stock options, at end of period (in dollars per share) | $ / shares	3.25
Vested or expected to vest, weighted average exercise price end of period (in dollars per share) | $ / shares	3.25
Exercisable non-qualified stock options, at end of period (in dollars per share) | $ / shares	$ 3.10
Outstanding non-qualified stock options, aggregate intrinsic value at end of period (in dollars per share) | $	$ 1,857,788	[1]
Vested or expected to vest, aggregate intrinsic value at end of period (in dollars per share) | $	1,857,788	[1]
Exercisable non-qualified stock options, aggregate intrinsic value at end of period (in dollars per share) | $	$ 1,408,824	[1]
Outstanding non-qualified stock options, weighted average contractual life	7 years 2 months 19 days
Vested or expected to vest, end of period, weighted average contractual life	7 years 2 months 19 days
Exercisable non-qualified stock options, aggregate intrinsic value at end of period, weighted average contractual life	6 years 3 months 22 days

[1] The intrinsic value of a stock option is the amount by which the market value exceeds the exercise price as of the end of the period presented.