Balance Sheet Account Detail (Property and Equipment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 36,210	$ 34,838
Accumulated depreciation	(12,945)	(11,483)
Property and equipment, net	23,265	23,355
Depreciation expense	5,300	4,600	$ 2,700
Production equipment, molds, and office furniture
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	11,714	13,603
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	8,162	6,380
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	15,495	14,345
Construction in progress (software and related implementation, production equipment, and leasehold improvements)
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 839	$ 510