Balance Sheet Account Detail (Property and Equipment) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 35,122		$ 35,122		$ 35,130
Accumulated depreciation	(23,284)		(23,284)		(21,978)
Property and equipment, net	11,838		11,838		13,152
Depreciation expense	600	$ 900	1,300	$ 1,800
Production equipment, molds and office furniture
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	10,937		10,937		10,844
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	7,907		7,907		7,897
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	15,594		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	$ 684		$ 684		$ 795