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13. Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2012
Commitments And Contingencies Tables  
Schedule for product warranties
   

Balance at

Beginning of

Year

   

Warranties

Issued

   

Warranties

Settled

   

Balance at

End of

Year

 
                         
2012   $ 247       267       (247 )   $ 267  
2011   $ 266       247       (266 )   $ 247  
2010    $ 228       263       (225 )   $ 266