Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Revenue	$ 2,030	$ 3,134
Operating expenses
Cost of revenue	4,191	1,502
General and administrative	12,816	22,353
Restructuring charge	2,499
Impairment of property and equipment	6,345
Impairment of intangible assets		303
Sales and marketing	55	238
Research and development	47	346
Total operating expenses	25,953	24,742
Operating loss	(23,923)	(21,608)
Other non-operating income (expense)
Interest expense	(3)	(385)
Accretion of debt discount	(905)	(5,627)
Warrant modification expense	(139)
Impairment/loss on sale of investments	(127)	(2,871)
(Loss) gain on sale of property and equipment	(47)	370
Inducement expense		(20,312)
Gain on extinguishment of debt	1,295
Total other non-operating income (expense)	74	(28,825)
Net loss	(23,849)	(50,433)
Deemed dividend	(2,514)
Net loss attributable to common stockholders	(26,363)	(50,433)
Other comprehensive loss
Reclassification adjustment for comprehensive loss included in net loss		66
Comprehensive loss	$ (26,363)	$ (50,367)
Per-share data
Basic and diluted loss per share	$ (0.36)	$ (1.34)
Weighted average number of common shares outstanding	73,056,223	37,744,600