Balance Sheet Account Detail - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 35,130	$ 36,617
Accumulated depreciation	(21,978)	(20,584)
Property and equipment, net	13,152	16,033
Production equipment, molds and office furniture
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	10,844	11,854
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	7,897	8,235
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	15,594	15,535
Construction in progress (software and related implementation, production equipment and leasehold improvements)
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 795	$ 993