Selected Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 2,629	$ 1,273	$ 462	$ 475	$ 1,907	$ 1,898	$ 5,454	$ 0	$ 4,839	$ 9,259	$ 2,511
Gross profit (loss)	2,591	1,131	(47)	242	1,549	1,413	5,379	0	3,917	8,341	(120)
(Loss) income from continuing operations					(17,288)	(3,132)	1,205	(3,262)	(19,023)	(22,477)	(15,870)
Income (loss) from discontinued operations					0	19	672	0	0	691	(1,068)
Net loss	$ (2,332)	$ (5,034)	$ (5,245)	$ (6,412)	$ (17,288)	$ (3,113)	$ 1,877	$ (3,262)	$ (19,023)	$ (21,786)	$ (16,938)
Earnings Per Share, Basic and Diluted	$ (0.05)	$ (0.10)	$ (0.10)	$ (0.13)					$ (0.38)	$ (0.55)	$ (0.49)
(Loss) income from continuing operations (USD per share)					$ (0.40)	$ (0.08)	$ 0.03	$ (0.09)
(Loss) income from discontinued operations (USD per share)					0.00	0.00	0.02	0.00
Net loss (USD per share)					(0.40)	(0.08)	0.05	(0.09)
Loss from continuing operations (USD per share)					(0.40)	(0.08)	0.03	(0.09)
(Loss) income from discontinued operations (USD per share)					0.00	0.00	0.02	0.00
Net loss (USD per share)					$ (0.40)	$ (0.08)	$ 0.05	$ (0.09)