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5. Convertible Notes (Tables)
6 Months Ended
Jun. 30, 2019
Debt Disclosure [Abstract]  
Convertible Notes and Warrants
  

June 30,
2019

(unaudited)

  

December 31,

2018

 
Balance due on convertible notes  $1,073,000   $1,886,000 
Accrued interest   151,000    123,000 
Subtotal   1,224,000    2,009,000 
Convertible note discount   (369,000)   (1,100,000)
Balance on convertible notes, net of note discounts  $855,000   $909,000