Stockholders’ Equity (Deficit) (Tables)

6 Months Ended

Jun. 30, 2020

Equity [Abstract]

Schedule of fair value calculations for the stock options granted

	Six Months Ended June 30, 2019
Risk free interest rate		2.30	%
Expected life (years)		6.1
Expected volatility		191.65	%
Expected dividend yield		None

Schedule of allocation of stock-based compensation expense

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Research and development	$	2	$	8	$	5	$	17
General and administrative	$	12	$	32	$	28	$	73
Director and consultant options	$	3	$	8	$	6	$	17
Total stock-based compensation expense	$	17	$	48	$	39	$	107

Schedule of option activity under the Company's plans

	2020								2019
Options	Shares		Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value		Shares		Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value
Outstanding at January 1,		1,077	$	1.59		-	$			1,037	$	1.65			$	-
Granted		-	$	-		-	$			40	$	0.50			$	-
Forfeited or expired		10	$	56.10		-	$			-	$	-			$	-
Outstanding at June 30		1,067	$	1.07		5.50	$			1,070	$	1.61		5.50	$	-
Vested and expected to vest at June 30		1,067	$	1.07		4.52	$	-		1,070	$	1.61		5.50	$	-
Exercisable at June 30		822	$	1.18		4.38	$	-		489	$	2.77		5.16	$	-

Schedule of significant ranges of outstanding and exercisable options

	Options Outstanding						Options Exercisable
Range of Exercise Prices	Number Outstanding		Weighted Average Remaining Contractual Term (in years)		Weighted Average Exercise Price per share		Number Outstanding		Weighted Average Exercise Price per Share
$0.01 – $0.50		655		4.24	$	0.50		574	$	0.50
$0.51 – $625.00		412		4.92	$	1.97		229	$	9.20
Total		1,067		4.52	$	1.07		822	$	2.77

Schedule of the company's non-vested shares

Non-vested Shares	Shares			Weighted Average Grant-Date Fair Value per share
Non-vested at January 1, 2020		417		$	0.65
Vested		(172	)	$	0.69
Non-vested at June 30, 2020		245		$	0.69

Schedule of warrant activity

	2020				2019
	Shares		Weighted Average Exercise Price Per Share		Shares		Weighted Average Exercise Price Per Share
Outstanding at beginning of period		2,536	$	1.52		1,828	$	2.08
Issued		30	$	-		985	$	0.50
Expired		-	$	-		-	$	-
Outstanding at end of period		2,566	$	1.52		2,813	$	1.58
Exercisable at end of period		2,566	$	1.52		2,813	$	1.58

Schedule of warrants outstanding and exercisable

Number of Warrants		Weighted Average Remaining Life (years)		Weighted Average Exercise Price per share
	1,551		0.89	$	2.18
	985		1.63	$	0.50
	30		2.61	$	0.50
	2,566		1.20	$	1.51