CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL DEFICIENCY - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Balance		$ (52,881)	$ (29,457)
Balance (in shares)	[1]	148,382,299	143,728,797
Share-based compensation related to stock options		$ 290	$ 46
Share-based compensation related to restricted stock award			$ 16
Share-based compensation related to restricted stock award (in shares)	[1]		29,898
Convertible notes conversions			$ 1,192
Convertible notes conversions (in shares)	[1]		1,811,260
Net loss for the period		(7,264)	$ (7,239)
Balance		$ (59,855)	$ (35,442)
Balance (in shares)	[1]	148,382,299	145,569,955
Common Stock [Member]
Balance		$ 148	$ 144
Share-based compensation related to restricted stock award	[2]
Convertible notes conversions			2
Balance		148	146
Additional Paid-in Capital [Member]
Balance		269,524	266,495
Share-based compensation related to stock options		290	46
Share-based compensation related to restricted stock award			16
Convertible notes conversions			1,190
Balance		269,814	267,747
Accumulated Deficit [Member]
Balance		(322,553)	(296,096)
Net loss for the period		(7,264)	(7,239)
Balance		$ (329,817)	$ (303,335)

[1] Common Stock, $0.001 par value; Authorized – as of March 31, 2019 and 2018 - 250,000,000.

[2] * Represents an amount less than $1.