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23. Stock-based Compensation (Details - Non-vested options) - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Options [Member]      
Weighted Average Exercise Price Per Share      
Forfeited (in dollars per share) $ 10 $ 36 $ 169
Options [Member] | Nonvested [Member]      
Shares      
Non-vested shares at beginning of year (in shares) 379,920 430,358 559,658
Granted (in shares) 287,000 325,300 268,491
Vested (in shares) (87,285) (100,663) (45,573)
Forfeited (in shares) (396,335) (275,075) (352,218)
Non-vested shares at end of year (in shares) 183,300 379,920 430,358
Weighted Average Exercise Price Per Share      
Non-vested shares at beginning of year (in dollars per share) $ 9 $ 46 $ 128
Granted (in dollars per share) 13 4 47
Vested (in dollars per share) 54 43 110
Forfeited (in dollars per share) 25 48 169
Non-vested shares at end of year (in dollars per share) $ 8 $ 9 $ 46
Restricted Stock [Member] | Nonvested [Member]      
Shares      
Non-vested shares at beginning of year (in shares) 1,313 4,750 8,778
Granted (in shares) 663,460 0 0
Vested (in shares) (663,273) (2,187) (2,778)
Forfeited (in shares) (250) (1,250) (1,250)
Non-vested shares at end of year (in shares) 1,250 1,313 4,750
Weighted Average Grant Date Fair Value Per Share      
Non-vested shares at beginning of year (in dollars per share) $ 264 $ 178 $ 178
Granted (in dollars per share) 1 0 0
Vested (in dollars per share) 1 128 178
Forfeited (in dollars per share) 185 177 177
Non-vested shares at end of year (in dollars per share) $ 185 $ 264 $ 178