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Patents (Tables)
 12 Months Ended
Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]  
Summary of Intangible Assets

Patents, net consists of the following at December 31:

ExpirationEstimated
Original
Life		20122011
Patent (Various)Various5   
$
9   
$
9   
Patent (Various)Various7   476   476   
5544255201313   93   93   
5647017201414   187   187   
5818955201515   373   373   
6064751201717   1,213   1,213   
6091835201717   4,394   4,394   
6,745   6,745   
Less accumulated amortization(5,090)  (4,725)  
$
1,655   
$
2.020