Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
Revenue	$ 1,519		$ 401
Cost of revenue	1,069		1,095
Gross profit (loss)	450		(694)
Operating Expenses
Research and development	29,273	$ 29,669	27,944
Sales and marketing	9,151	2,855	1,727
General and administrative	10,813	7,831	5,741
Amortization of intangible assets	6,967	2,185	503
Change in fair value of contingent consideration	482	(400)
Inventory write-down related to restructuring	2,565
Restructuring and other charges	3,064
Goodwill impairment	61,784	0
Acquisition related costs	0	4,231
Total Operating Expenses	124,099	46,371	35,915
Operating Loss	(123,649)	(46,371)	(36,609)
Other Expense
Interest expense, net	(1,889)	(1,601)	(1,043)
Other income	35
Total Other Expense, net	(1,854)	(1,601)	(1,043)
Loss before income taxes	(125,503)	(47,972)	(37,652)
Income tax benefit	5,523	1,024
Net loss	(119,980)	(46,948)	(37,652)
Other comprehensive loss
Foreign currency translation loss	(2,603)	(3,166)
Comprehensive loss	$ (122,583)	$ (50,114)	$ (37,652)
Net loss per share - basic and diluted	$ (1.07)	$ (0.59)	$ (0.64)
Weighted average common shares outstanding - basic and diluted	112,185	79,628	58,714