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7. Debt (Details - Notes payable) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Total notes payable   $ 6,279
Less current maturities $ 0 (3,166)
Total long-term portion 0 3,113
Term Loan 1 [Member]    
Total notes payable $ 0 $ 2,832
Debt maturity date May 31, 2018  
Debt interest rate   4.07%
Term Loan 2 [Member]    
Total notes payable $ 0 $ 3,447
Debt maturity date May 31, 2019  
Debt interest rate   3.86%