Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Revenue	$ 1,584		$ 3,530
Cost of revenue	972		2,306
Gross profit	612		1,224
Operating Expenses
Research and development	5,070	$ 6,364	11,925	$ 14,749
Sales and marketing	3,749	1,306	7,472	2,989
General and administrative	2,719	2,895	5,768	5,134
Amortization of intangible assets	1,687	1,786	3,323	3,603
Change in fair value of contingent consideration	(774)	944	453	1,800
Change in fair value of warrant liabilities	2,326		2,326
Issuance costs for warrants	627		627
Inventory write-down related to restructuring		2,565		2,565
Restructuring and other charges		3,085		3,085
Goodwill impairment	0	61,784		61,784
Total Operating Expenses	15,404	80,729	31,894	95,709
Operating Loss	(14,792)	(80,729)	(30,670)	(95,709)
Other Expense
Interest expense, net	(622)	(489)	(956)	(1,067)
Other (expense) income	(40)	95	(100)	95
Total Other Expense, net	(662)	(394)	(1,056)	(972)
Loss before income taxes	(15,454)	(81,123)	(31,726)	(96,681)
Income tax benefit	741	992	1,599	3,637
Net loss	(14,713)	(80,131)	(30,127)	(93,044)
Other comprehensive income (loss)
Foreign currency translation gain (loss)	5,430	(2,286)	6,563	1,510
Comprehensive loss	$ (9,283)	$ (82,417)	$ (23,564)	$ (91,534)
Net loss per share - basic and diluted	$ (0.11)	$ (0.70)	$ (0.24)	$ (0.85)
Weighted average common shares outstanding - basic and diluted	132,386	114,319	127,052	109,290