CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN CAPITAL DEFICIENCY - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019		Jun. 30, 2018
Beginning balance		$ (59,855)	$ (35,442)	$ (52,881)		$ (29,457)
Share-based compensation related to stock options		113	12	403		58
Share-based compensation related to restricted stock award						16
Convertible notes conversions						1,192
Convertible notes exchange			1,150			1,150
Net loss for the period		(7,743)	(8,462)	(15,007)		(15,701)
Ending balance		(67,485)	(42,742)	(67,485)		(42,742)
Common Stock [Member]
Beginning balance		$ 148	$ 146	$ 148		$ 144
Beginning balance (in shares)		148,382,299	145,569,955	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]					1,811,260
Convertible notes exchange			$ 2			$ 2
Convertible notes exchange (in shares)			2,613,636			2,613,636
Ending balance		$ 148	$ 148	$ 148		$ 148
Ending balance (in shares)	[1]	148,382,299	148,183,591	148,382,299		148,183,591
Additional Paid-in Capital [Member]
Beginning balance		$ 269,814	$ 267,747	$ 269,524		$ 266,495
Share-based compensation related to stock options		113	12	403		58
Share-based compensation related to restricted stock award						16
Convertible notes conversions						1,190
Convertible notes exchange			1,148			1,148
Ending balance		269,927	268,907	269,927		268,907
Accumulated Deficit [Member]
Beginning balance		(329,817)	(303,335)	(322,553)		(296,096)
Net loss for the period		(7,743)	(8,462)	(15,007)		(15,701)
Ending balance		$ (337,560)	$ (311,797)	$ (337,560)		$ (311,797)

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

[2] Represents an amount less than $1.