Balance Sheet Account Detail (Property, Plant and Equipment) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 16,975,000	$ 12,896,000
Accumulated depreciation	(9,637,000)	(7,912,000)
Property and equipment, net	7,338,000	4,984,000
Depreciation expense	2,100,000	1,500,000	1,300,000
Production equipment, molds, and office furniture
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	8,033,000	7,256,000
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	3,290,000	2,265,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	3,058,000	2,819,000
Construction in progress (software and related implementation, production equipment, and leasehold improvements)
Property, Plant and Equipment [Line Items]
Property and equipment, at cost	$ 2,594,000	$ 556,000