Balance Sheet Account Detail (Property and Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 36,991		$ 36,991		$ 36,210
Accumulated depreciation	(15,691)		(15,691)		(12,945)
Property and equipment, net	21,300		21,300		23,265
Depreciation expense	1,300	$ 1,300	2,700	$ 2,600
Production equipment, molds, and office furniture
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	11,908		11,908		11,714
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	8,746		8,746		8,162
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	15,495		15,495		15,495
Construction in progress (software and related implementation, production equipment, and leasehold improvements)
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 842		$ 842		$ 839