CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL DEFICIENCY - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019		Sep. 30, 2018
Beginning balance		$ (67,485)	$ (42,742)	$ (52,881)		$ (29,457)
Share-based compensation related to stock options		196	22	599		80
Share-based compensation related to restricted stock award						16
Convertible notes conversions						1,291
Convertible notes exchange			99			1,150
Net loss for the period		(3,560)	(5,322)	(18,567)		(21,023)
Ending balance		(70,849)	(47,943)	(70,849)		(47,943)
Common Stock [Member]
Beginning balance		$ 148	$ 148	$ 148		$ 144
Beginning balance (in shares)		148,382,299	148,183,591	148,382,299	[1]	143,728,797	[1]
Share-based compensation related to restricted stock award	[2]
Share-based compensation related to restricted stock award (in shares)	[1]					29,898
Convertible notes conversions						$ 2
Convertible notes conversions (in shares)	[1]					1,928,907
Convertible notes exchange						$ 2
Convertible notes exchange (in shares)			117,647			2,613,636
Ending balance		$ 148	$ 148	$ 148		$ 148
Ending balance (in shares)	[1]	148,382,299	148,301,238	148,382,299		148,301,238
Additional Paid-in Capital [Member]
Beginning balance		$ 269,927	$ 268,907	$ 269,524		$ 266,495
Share-based compensation related to stock options		196	22	599		80
Share-based compensation related to restricted stock award						16
Convertible notes conversions						1,289
Convertible notes exchange			99			1,148
Ending balance		270,123	269,028	270,123		269,028
Accumulated Deficit [Member]
Beginning balance		(337,560)	(311,797)	(322,553)		(296,096)
Net loss for the period		(3,560)	(5,322)	(18,567)		(21,023)
Ending balance		$ (341,120)	$ (317,119)	$ (341,120)		$ (317,119)

[1] Common Stock, $0.001 par value; Authorized - as of September 30, 2019 and 2018 - 350,000,000 and 250,000,000, respectively.

[2] Represents an amount less than $1.