STOCK BASED COMPENSATION (Tables)

6 Months Ended

Jun. 30, 2019

STOCK BASED COMPENSATION

Schedule of assumptions used principally in determining the fair value of options granted

	June 30,	December 31,
	2019	2018
Risk-free interest rate	2.55%	2.45 - 2.88%
Expected dividend yield	0%	0%
Expected term (employee grants)	6 Years	5.62 Years
Expected volatility	105%	104%

Summary of option activity

				Weighted
		Weighted		Average
		Average		Remaining	Aggregate
		Exercise		Contractual	Intrinsic
Options	Shares	Price		Term in Years	Value
Outstanding at December 31, 2018	54,849	$	100.83	7.32	$	—
Granted	90,000	$	1.53
Expired	(2,500)	$	231.00
Cancelled/Forfeited	(17,459)	$	40.12
Outstanding at June 30, 2019	124,890	$	35.15	8.67	$	—
Vested and Exercisable at June 30, 2019	27,278	$	136.27	6.01	$	—

Summary of restricted stock unit activity

		Weighted-Average
	Number of Grants	Grant Date Fair Value
Unvested balance at December 31, 2018	10,250	$	23.13
Granted	—	$	—
Vested/Released	(1,500)	$	22.00
Forfeited	—	$	—
Unvested balance at June 30, 2019	8,750	$	23.22