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23. Stock-based Compensation (Details - Option Activity) - Options [Member] - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Shares        
Outstanding at the beginning of the period (in shares) 501,260 550,760 635,488  
Exercised (in shares) 0 0 (1,000)  
Forfeited (in shares) (528,060) (374,800) (352,218)  
Outstanding at the end of the period (in shares) 260,200 501,260 550,760  
Vested and exercisable at the end of the period (in shares) 76,900      
Expected to vest at the end of the period (in shares) 177,383      
Weighted-Average Exercise Price Per Share        
Outstanding at the beginning of the period (in dollars per share) $ 66 $ 82 $ 145  
Exercised (in dollars per share) 49  
Forfeited (in dollars per share) 10 36 169  
Outstanding at the end of the period (in dollars per share) 212 $ 66 $ 82  
Vested and exercisable at the end of the period (in dollars) 29      
Expected to vest at the end of the period (in dollars) $ 12      
Weighted-Average Remaining Contractual Term        
Weighted Average Remaining Contractual Life 8 years 7 months 2 days 7 years 11 days 7 years 4 months 24 days  
Vested and exercisable at the end of the period 9 years 1 month 13 days      
Expected to vest at the end of the period 8 years 3 months 15 days      
Aggregate Intrinsic Value        
Aggregate Intrinsic Value $ 0 $ 769 $ 60,032 $ 87,401
Vested and exercisable at year end 0      
Expected to vest at year end $ 0