Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]	Total
Balance, at beginning at Dec. 31, 2012	$ 166	$ 288,671	$ (43)	$ (244,094)	$ 44,700
Balance, at beginning (in shares) at Dec. 31, 2012	166,490,190
Shares issued for:
Settlement of accounts payable	$ 1	268			269
Settlement of accounts payable (in shares)	1,196,769
Shares sold at the market	$ 1	248			249
Shares sold at the market (in shares)	973,411
Equity-based compensation		376			376
Net comprehensive loss			$ (71)	$ (16,225)	(16,296)
Balance, at end at Dec. 31, 2013	$ 168	289,563	$ (114)	$ (260,319)	29,298
Balance, at end (in shares) at Dec. 31, 2013	168,660,370
Shares issued for:
Settlement of accounts payable		59			59
Settlement of accounts payable (in shares)	229,031
Shares sold at the market	$ 36	12,781			12,817
Shares sold at the market (in shares)	35,115,417
Equity-based compensation		326			326
Net comprehensive loss			$ (46)	$ (17,450)	(17,496)
Balance, at end at Dec. 31, 2014	$ 204	302,729	$ (160)	$ (277,769)	25,004
Balance, at end (in shares) at Dec. 31, 2014	204,004,818
Shares issued for:
Settlement of accounts payable	$ 2	670			672
Settlement of accounts payable (in shares)	2,558,779
Shares sold at the market	$ 41	9,640			9,681
Shares sold at the market (in shares)	40,995,890
Equity-based compensation		181			181
Net comprehensive loss			$ 63	$ (15,230)	(15,167)
Balance, at end at Dec. 31, 2015	$ 247	$ 313,220	$ (97)	$ (292,999)	$ 20,371
Balance, at end (in shares) at Dec. 31, 2015	247,559,487