CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' DEFICIT - USD ($) $ in Thousands	Preferred Stock [Member]	Preferred Stock [Member] Series C Preferred Stock [Member]	Preferred Stock [Member] Series D Preferred Stock [Member]	Common Stock [Member]	Common Stock [Member] Series C Preferred Stock [Member]	Common Stock [Member] Series D Preferred Stock [Member]	Additional Paid-in Capital [Member]	Additional Paid-in Capital [Member] Series C Preferred Stock [Member]	Additional Paid-in Capital [Member] Series D Preferred Stock [Member]	Accumulated Deficit [Member]	Accumulated Deficit [Member] Series C Preferred Stock [Member]	Accumulated Deficit [Member] Series D Preferred Stock [Member]	Accumulated Other Comprehensive Loss [Member]	Accumulated Other Comprehensive Loss [Member] Series C Preferred Stock [Member]	Accumulated Other Comprehensive Loss [Member] Series D Preferred Stock [Member]	Total	Series C Preferred Stock [Member]	Series D Preferred Stock [Member]
Beginning balance at Dec. 31, 2019	$ 0			$ 294			$ 115,458			$ (125,752)			$ (62)			$ (10,062)
Beginning balance (in shares) at Dec. 31, 2019	0			293,780,400
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification of warrant liability due to cashless warrant exercise																0
Proceeds from warrant exercise	$ 0			$ 1			9			0			0			10
Proceeds from warrant exercise (in shares)	0			1,000,000
Conversion of short term notes and convertible notes payable				$ 5			560			0			0			565
Conversion of short term notes and convertible notes payable (in shares)	0			4,829,789
Conversion of notes payable, related parties	$ 0			$ 15			2,275									2,290
Conversion of notes payable, related parties (in shares)	0			15,475,235
Conversion of advances from related parties	$ 0			$ 0			18			0			0			18
Conversion of advances from related parties (in shares)	0			262,811
Preferred Stock Conversion		$ 0	$ 0		$ 16	$ 2		$ 2,234	$ 198		$ 0	$ 0		$ 0	$ 0		$ 2,250	$ 200
Preferred Stock Conversion (in shares)		0	0		16,071,390	1,428,568
Shares issued for services	$ 0			$ 8			1,789			0			0			1,796
Shares issued for services (in shares)	0			8,200,000
Inducement shares issued	$ 0			$ 0			45			0			0			45
Inducement shares issued (in shares)	0			200,000
Proceeds from PIPE offering, net of offering costs	$ 0			$ 125			12,558			0			0			12,683
Proceeds from PIPE offering, net of offering costs (in shares)	0			124,621,428
LGH Warrant Liability	$ 0			$ 0			(249)			0			0			(249)
Stock-based compensation	0			0			22			0			0			22
Proceeds from stock option exercise	$ 0			$ 0			44			0			0			44
Proceeds from stock option exercise (in shares)	0			225,000
Beneficial conversion feature on convertible debt	$ 0			$ 0			561			0			0			561
Net loss	0			0			0			(19,273)			0			(19,273)
Foreign currency translation adjustment	0			0			0			0			0			1
Ending balance at Sep. 30, 2020	$ 0			$ 466			135,522			(145,025)			(62)			(9,099)
Ending balance (in shares) at Sep. 30, 2020	0			466,094,621
Beginning balance at Jun. 30, 2020	$ 0			$ 302			117,327			(132,387)			(65)			(14,823)
Beginning balance (in shares) at Jun. 30, 2020	0			302,119,428
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Conversion of notes payable, related parties	$ 0			$ 15			2,276			0			0			2,291
Conversion of notes payable, related parties (in shares)	0			15,475,235
Conversion of short-term notes and settlements	$ 0			$ 2			208			0			0			210
Conversion of short-term notes and settlements (in shares)	0			2,250,000
Preferred Stock Conversion		$ 0	$ 0		$ 16	$ 2		$ 2,234	$ 198		$ 0	$ 0		$ 0	$ 0		$ 2,250	$ 200
Preferred Stock Conversion (in shares)		0	0		16,071,390	1,428,568
Shares issued for services	$ 0			$ 5			1,075			0			0			1,080
Shares issued for services (in shares)	0			5,000,000
Inducement shares issued	$ 0			$ 0			45			0			0			45
Inducement shares issued (in shares)	0			200,000
Proceeds from PIPE offering, net of offering costs	$ 0			$ 124			12,408			0			0			12,532
Proceeds from PIPE offering, net of offering costs (in shares)	0			123,550,000
LGH Warrant Liability	$ 0			$ 0			(249)			0			0			(249)
Net loss	0			0			0			(12,638)			0			(12,638)
Foreign currency translation adjustment	0			0			0			0			3			3
Ending balance at Sep. 30, 2020	$ 0			$ 466			135,522			(145,025)			(62)			(9,099)
Ending balance (in shares) at Sep. 30, 2020	0			466,094,621
Beginning balance at Dec. 31, 2020	$ 0			$ 471			142,563			(156,690)			(62)			(13,718)
Beginning balance (in shares) at Dec. 31, 2020	0			470,694,621
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cashless warrant exercise	$ 0			$ 11			(11)			0			0			0
Cashless warrant exercise (in shares)	0			10,925,000
Reclassification of warrant liability due to cashless warrant exercise	$ 0			$ 0			2,030			0			0			2,030
Reclassification of warrant liability due to cashless warrant exercise (in shares)	0			0
Net loss	$ 0			$ 0			0			(17,804)			0			(17,804)
Foreign currency translation adjustment	0			0			0			0			(12)			(12)
Ending balance at Sep. 30, 2021	$ 0			$ 482			144,582			(174,494)			(74)			(29,504)
Ending balance (in shares) at Sep. 30, 2021	0			481,619,621
Beginning balance at Jun. 30, 2021	$ 0			$ 482			144,582			(170,242)			(74)			(25,252)
Beginning balance (in shares) at Jun. 30, 2021	0			481,619,621
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 0			$ 0			0			(4,252)			0			(4,252)
Ending balance at Sep. 30, 2021	$ 0			$ 482			$ 144,582			$ (174,494)			$ (74)			$ (29,504)
Ending balance (in shares) at Sep. 30, 2021	0			481,619,621