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7. Notes Payable (Tables)
12 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]  
Schedule Of Notes Payable
   December 31, 
   2017   2016 
         
Variable rate term loan due May 31, 2018. Principal and interest (4.07% at December 31, 2017) payable monthly with a balloon payment due at maturity.  $2,832   $3,339 
           
Variable rate term loan due May 31, 2019. Principal and interest (3.86% at December 31, 2017) payable monthly with a balloon payment due at maturity.   3,447    3,780 
Total notes payable   6,279    7,119 
Less current portion   (3,166)   (840)
Total long-term portion  $3,113   $6,279 
Maturities Of Notes Payable
2018  $3,166 
2019   3,113 
Total  $6,279