Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property and Equipment, net
Property and equipment	$ 607	$ 402
Accumulated depreciation	(126)	(42)
Property and equipment, net	481	360
Depreciation expense	120	90	$ 12
Write-down of property and equipment held for sale	216	289
Computer equipment
Property and Equipment, net
Property and equipment	310	262
Manufacturing equipment
Property and Equipment, net
Property and equipment	149	101
Furniture and Fixtures [Member]
Property and Equipment, net
Property and equipment	115	$ 39
Leasehold Improvements [Member]
Property and Equipment, net
Property and equipment	$ 33