Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Income Statement [Abstract]
Revenue	$ 7,111,000	$ 1,519,000
Cost of revenue	6,727,000	1,069,000
Gross profit	384,000	450,000
Operating Expenses
Research and development	21,989,000	29,273,000	$ 29,669,000
Sales and marketing	17,536,000	9,151,000	2,855,000
General and administrative	12,275,000	10,813,000	7,831,000
Amortization of intangible assets	7,858,000	6,967,000	2,185,000
Change in fair value of contingent consideration	2,026,000	482,000	(400,000)
Issuance costs for warrants	627,000
Inventory write-down related to restructuring		2,565,000
Restructuring and other charges		3,064,000
Goodwill impairment	0	61,784,000	0
Acquisition related costs			4,231,000
Total Operating Expenses	62,311,000	124,099,000	46,371,000
Operating Loss	(61,927,000)	(123,649,000)	(46,371,000)
Other Expense
Change in fair value of warrant liabilities	(83,734,000)
Interest expense, net	(2,135,000)	(1,889,000)	(1,601,000)
Other (expense) income	(300,000)	35,000
Total Other Expense, net	(86,169,000)	(1,854,000)	(1,601,000)
Loss before income taxes	(148,096,000)	(125,503,000)	(47,972,000)
Income tax benefit	3,300,000	5,523,000	1,024,000
Net loss	(144,796,000)	(119,980,000)	(46,948,000)
Other comprehensive loss
Foreign currency translation gain (loss)	10,797,000	(2,603,000)	(3,166,000)
Comprehensive loss	$ (133,999,000)	$ (122,583,000)	$ (50,114,000)
Net loss per share - basic and diluted	$ (0.97)	$ (1.07)	$ (0.59)
Weighted average common shares outstanding - basic and diluted	148,744	112,185	79,628