Property and Equipment (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 15,498,000		$ 15,498,000		$ 14,030,000
Less: Accumulated depreciation	(10,307,000)		(10,307,000)		(8,665,000)
Property and equipment, net	5,191,000		5,191,000		5,365,000
Depreciation, Depletion and Amortization [Abstract]
Depreciation	500,000	500,000	1,600,000	1,300,000
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	8,092,000		8,092,000		7,345,000
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	958,000		958,000		924,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,139,000		2,139,000		2,125,000
Manufacturing tools and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	3,136,000		3,136,000		3,081,000
Construction in process
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,173,000		$ 1,173,000		$ 555,000