Summary of Significant Accounting Policies Intangible Asset Narrative (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Patents [Member]	Dec. 31, 2011 Patents [Member]	Dec. 31, 2012 Licensing Agreements [Member]	Jun. 30, 2012 Licensing Agreements [Member]	Dec. 31, 2011 Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Net	$ 239		$ 111	$ 137		$ 60	$ 65
Finite-Lived Intangible Assets, Accumulated Amortization			822	767	15		10
Amortization of Intangible Assets	99	228
Write-off intangible assets	38	160
Pending Patent	$ 68