CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (CAPITAL DEFICIENCY) - USD ($) $ in Thousands	Total	Common Stock [Member]		Additional Paid-in Capital [Member]	Accumulated Deficit [Member]
Balance at Dec. 31, 2015	$ 10,873	$ 100		$ 194,064	$ (183,291)
Balance (in shares) at Dec. 31, 2015		99,800,397
Issuance of common stock, net of issuance cost	6,848	$ 24		6,824
Issuance of common stock, net of issuance cost (in shares)		23,846,735
Share-based compensation related to stock options	920			920
Share-based compensation related to restricted stock award	68		[1]	68
Share-based compensation related to restricted stock award (in shares)		7,843
Equity component of convertible notes	685			685
Exercise of options granted to employee (including net exercise)	14		[1]	14
Exercise of options granted to employee (including net exercise) (in shares)		479,110
Net loss from continuing operations	(29,176)				(29,176)
Net loss from discontinued operations	(189)				(189)
Balance at Dec. 31, 2016	(9,957)	$ 124		202,575	(212,656)
Balance (in shares) at Dec. 31, 2016		124,134,085
Share-based compensation related to stock options	337			337
Reclassification of embedded derivative	43,634			43,634
Convertible notes conversions	18,654	$ 20		18,634
Convertible notes conversions (in shares)		19,594,712
Equity component of convertible notes	1,315			1,315
Net loss from continuing operations	(83,440)				(83,440)
Balance at Dec. 31, 2017	(29,457)	$ 144		266,495	(296,096)
Balance (in shares) at Dec. 31, 2017		143,728,797
Share-based compensation related to stock options	498			498
Share-based compensation related to restricted stock award	16		[1]	16
Share-based compensation related to restricted stock award (in shares)		29,898
Convertible notes conversions	1,369	$ 2		1,367
Convertible notes conversions (in shares)		2,009,968
Convertible notes payment	1,150	$ 2		1,148
Convertible notes payment (in shares)		2,613,636
Net loss from continuing operations	(26,457)				(26,457)
Balance at Dec. 31, 2018	$ (52,881)	$ 148		$ 269,524	$ (322,553)
Balance (in shares) at Dec. 31, 2018		148,382,299

[1] Represents an amount of less than $1 thousand.