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8. Stock Based Compensation (Details 2)
 9 Months Ended
Sep. 30, 2020
$ / shares
shares
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Number of nonvested options outstanding, beginning | shares 5,416
Vested | shares (3,228)
Number of nonvested options outstanding, ending | shares 2,188
Weighted Average Exercise Price Per share  
Outstanding, beginning $ 5.48
Vested 5.47
Outstanding, ending 5.50
Outstanding, beginning 3.01
Vested 2.98
Outstanding, ending $ 3.05