Commitments Schedule of Future Minimum Rental Payments for Operating Leases (Details) (USD $)	6 Months Ended
	Jun. 30, 2012 sqft	Jun. 30, 2012 Inventories	Dec. 31, 2011 Inventories
Unrecorded Unconditional Purchase Obligation [Line Items]
Non-cancelable purchase commitment with a third party manufacturer to purchase inventory		$ 3,700,000	$ 4,900,000
Additional square feet added on lease renewal	2,130
2012 (remaining six months)	658,000
2013	1,461,000
2014	1,474,000
2015	1,480,000
2016 and beyond	470,000
Total minimum lease payments	$ 5,543,000