Balance Sheet Account Detail (Property and Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 35,102		$ 35,130
Accumulated depreciation	(22,629)		(21,978)
Property and equipment, net	12,473		13,152
Depreciation expense	700	$ 900
Production equipment, molds, and office furniture
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	10,919		10,844
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	7,895		7,897
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	15,594		15,594
Construction in progress (software and related implementation, production equipment, and leasehold improvements)
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 694		$ 795