Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Revenue	$ 183	$ 1,466	$ 3,713	$ 1,466
Cost of revenue	921	1,031	3,227	1,031
Gross (loss) profit	(738)	435	486	435
Operating Expenses
Research and development	4,889	7,011	16,814	21,760
Sales and marketing	4,528	2,574	12,000	5,563
General and administrative	2,920	2,793	8,688	7,927
Amortization of intangible assets	1,821	1,709	5,144	5,312
Change in fair value of contingent consideration	773	(100)	1,226	1,700
Change in fair value of warrant liabilities	22,887		25,213
Issuance costs for warrants			627
Inventory write-down related to restructuring				2,565
Restructuring and other charges				3,085
Goodwill impairment	0			61,784
Total Operating Expenses	37,818	13,987	69,712	109,696
Operating Loss	(38,556)	(13,552)	(69,226)	(109,261)
Other Expense
Interest expense, net	(501)	(432)	(1,457)	(1,499)
Other (expense) income	(194)	(30)	(294)	65
Total Other Expense, net	(695)	(462)	(1,751)	(1,434)
Loss before income taxes	(39,251)	(14,014)	(70,977)	(110,695)
Income tax benefit	738	1,070	2,337	4,707
Net loss	(38,513)	(12,944)	(68,640)	(105,988)
Other comprehensive income
Foreign currency translation gain	2,952	689	9,515	2,199
Comprehensive loss	$ (35,561)	$ (12,255)	$ (59,125)	$ (103,789)
Net loss per share - basic and diluted	$ (0.26)	$ (0.11)	$ (0.51)	$ (0.95)
Weighted average common shares outstanding - basic and diluted	149,516	114,946	134,622	111,189