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7. Notes Payable (Details - Notes payable) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Total notes payable $ 6,279 $ 7,119
Less current maturities (3,166) (840)
Total long-term portion 3,113 6,279
Term Loan 1 [Member]    
Total notes payable $ 2,832 $ 3,339
Debt maturity date May 31, 2018  
Debt interest rate   4.07%
Term Loan 2 [Member]    
Total notes payable $ 3,447 $ 3,780
Debt maturity date May 31, 2019  
Debt interest rate   3.86%