Condensed Consolidated Statements of Stockholders' Deficit (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Total
Balances at Dec. 31, 2018	$ 110	$ 266,381	$ (274,601)	$ (8,110)
Balances (in shares) at Dec. 31, 2018	109,897,526
Issuance of common stock in exchange for services	$ 82,432	68		68
Issuance of common stock for payment of compensation		90		90
Issuance of common stock for payment of compensation, shares	93,358
Issuance of stock options for payment of accrued compensation		195		195
Exercise of stock options		50		50
Exercise of stock options, shares	75,000
Stock-based compensation expense		697		697
Net loss			(2,541)	(2,541)
Balances at Mar. 31, 2019	$ 110	267,481	(277,142)	(9,551)
Balances (in shares) at Mar. 31, 2019	110,148,316
Balances at Dec. 31, 2018	$ 110	266,381	(274,601)	(8,110)
Balances (in shares) at Dec. 31, 2018	109,897,526
Issuance of common stock upon note conversions				981
Issuance of warrant for services
Net loss				(5,879)
Balances at Jun. 30, 2019	$ 113	269,606	(280,480)	(10,761)
Balances (in shares) at Jun. 30, 2019	112,741,563
Balances at Mar. 31, 2019	$ 110	267,481	(277,142)	(9,551)
Balances (in shares) at Mar. 31, 2019	110,148,316
Issuance of common stock upon note conversions	$ 2	979		981
Issuance of common stock upon note conversions, shares	2,179,622
Convertible note beneficial conversion feature		143		143
Exercise of stock options	$ 1	274		275
Exercise of stock options, shares	413,625
Stock-based compensation expense		729		729
Net loss			(3,338)	(3,338)
Balances at Jun. 30, 2019	$ 113	269,606	(280,480)	(10,761)
Balances (in shares) at Jun. 30, 2019	112,741,563
Balances at Dec. 31, 2019	$ 114	270,463	(284,895)	(14,318)
Balances (in shares) at Dec. 31, 2019	114,034,451
Issuance of common stock		65		65
Issuance of common stock (in shares)	200,000
Issuance of common stock in exchange for services		13		13
Issuance of common stock in exchange for services, shares	29,342
Issuance of stock options for payment of compensation		133		133
Issuance of common stock for payment of compensation		19		19
Issuance of common stock for payment of compensation, shares	47,997
Issuance of warrant for services		1		1
Stock-based compensation expense		265		265
Net loss			(2,467)	(2,467)
Balances at Mar. 31, 2020	$ 114	270,959	(287,362)	(16,289)
Balances (in shares) at Mar. 31, 2020	114,311,790
Balances at Dec. 31, 2019	$ 114	270,463	(284,895)	(14,318)
Balances (in shares) at Dec. 31, 2019	114,034,451
Issuance of common stock upon note conversions				$ 4,316
Exercise of stock options, shares				1,084,316
Issuance of warrant for services				$ 118
Net loss				(26,489)
Balances at Jun. 30, 2020	$ 210	342,775	(311,384)	31,601
Balances (in shares) at Jun. 30, 2020	209,874,577
Balances at Mar. 31, 2020	$ 114	270,959	(287,362)	(16,289)
Balances (in shares) at Mar. 31, 2020	114,311,790
Issuance of common stock for conversion of debt	$ 12	4,304		4,316
Issuance of common stock for conversion of debt, shares	11,989,578
Issuance of common stock, net of expenses	$ 83	66,921		67,004
Issuance of common stock, net of expenses, shares	82,528,718
Issuance of common stock in exchange for services		57		57
Issuance of common stock in exchange for services, shares	77,313
Issuance of stock options for payment of compensation		32		32
Issuance of common stock for payment of compensation		29		29
Issuance of common stock for payment of compensation, shares	24,574
Issuance of warrant for services		117		117
Issuance of common stock upon option exercise	$ 1	(1)
Issuance of common stock upon option exercise, shares	942,604
Stock-based compensation expense		357		357
Net loss			(24,022)	(24,022)
Balances at Jun. 30, 2020	$ 210	$ 342,775	$ (311,384)	$ 31,601
Balances (in shares) at Jun. 30, 2020	209,874,577