Consolidated Statements of Shareholders' Equity (Deficit) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Warrant [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2013		375,707,190
Balance at Dec. 31, 2013	$ 376	$ 18,179	$ 182,832	$ (204,090)	$ (42)	$ (2,745)
Common stock issuance (in shares)		85,355,615
Common stock issuance	85		15,915			16,000
Warrant exercises (in shares)		1,178,000
Warrant exercises	1		225			226
Stock option exercises (in shares)		2,242,014
Stock option exercises	2		203			205
Stock-based compensation			907			907
Restricted stock issued to officer			312			312
Reclassification of warrant liability to equity upon exercise			216			216
Net loss				(6,546)	(12)	(6,558)	$ (6,558)
Balance (in shares) at Dec. 31, 2014		464,482,819
Balance at Dec. 31, 2014	464	$ 18,179	200,610	(210,636)	(54)	8,563
Common stock issuance (in shares)		12,500,000
Common stock issuance	13		1,555			1,568
Stock option exercises (in shares)		166,666					166,666
Stock option exercises			13			13
Stock-based compensation			1,375			1,375
Restricted stock issued to officer			182			182
Net loss				(7,309)	(8)	(7,317)	$ (7,317)
Balance (in shares) at Dec. 31, 2015		477,149,485
Balance at Dec. 31, 2015	477	$ 18,179	203,735	(217,945)	(62)	4,384	$ 4,384
Common stock issuance (in shares)		405,000,000
Common stock issuance	405		60,974			61,379
Warrant exercises (in shares)		1,743,480
Warrant exercises	2		663			665
Stock option exercises (in shares)		2,197,199					2,197,199
Stock option exercises	2		204			206
Stock-based compensation			1,694			1,694
Net loss				(18,744)	(8)	(18,752)	$ (18,752)
Balance (in shares) at Dec. 31, 2016		886,090,164
Balance at Dec. 31, 2016	$ 886	$ 18,179	272,520	$ (236,689)	$ (70)	54,826	$ 54,826
Written call options			3,124			3,124
Loss on contract modification			$ 2,126			$ 2,126