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7. Stockholders' Equity (Tables)
9 Months Ended
Sep. 30, 2019
Equity [Abstract]  
Schedule of repurchased shares
   Total Number
of Shares
Purchased
   Average
Price
paid per
Share
   Approximate Dollar
Value of Shares that
May Yet be Purchased
under the Program
   Plan Expiration Date
                
May 1, 2018 - May 30, 2018   1,190,420   $3.89   $15,366,000   February 28, 2019
Totals for 2018   1,190,420   $3.89