Balance Sheet Account Detail (Property and Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 36,590		$ 36,210
Accumulated depreciation	(14,315)		(12,945)
Property and equipment, net	22,275		23,265
Depreciation expense	1,400	$ 1,300
Production equipment, molds, and office furniture
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	11,853		11,714
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	8,321		8,162
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	15,494		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	$ 922		$ 839