Net Loss per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net loss - Basic	$ (4,197)	$ (4,255)	$ (6,514)	$ (7,101)
Dilutive shares related to warrants	0	0	0	0
Net loss - Dilutive	$ (4,214)	$ (4,255)	$ (6,540)	$ (7,101)
Weighted Average Number of Shares Outstanding, Basic	128,918,408	123,005,220	128,743,616	120,241,593
Dilutive shares related to warrants	0	0	0	0
Weighted Average Number of Shares Outstanding, Diluted	128,918,408	123,005,220	128,743,616	120,241,593
Earnings Per Share, Basic	$ (0.03)	$ (0.03)	$ (0.05)	$ (0.06)
Earnings Per Share, Diluted	$ (0.03)	$ (0.03)	$ (0.05)	$ (0.06)