| Schedule of convertible notes receivable | 
 Convertible
notes receivable consists of the following: 
Schedule
of convertible notes receivable  
  
    |   | 
  | 
    June 30, 2021 | 
  | 
  | 
    December 31, 2020 | 
  | 
 
  
    |   | 
  | 
      | 
  | 
  | 
      | 
  | 
 
  
    | November 22, 2017, NeuCourt, Inc. convertible note receivable including accrued interest of $2,102 and $1,454 at June 30, 2021 and December 31, 2020. The note bears interest at 5% per annum, originally matured November 22, 2019, and was extended to mature November 22, 2021. Principal and accrued interest are due at maturity. Upon extension, the Company received a cash payment of $2,496 for interest accrued through November 4, 2019. Principal and unpaid interest may be converted into a blend of shares of a to-be-created series of Preferred Stock and Common Stock of NeuCourt (i) on closing of a future financing round of at least $750,000, (ii) on the election of NeuCourt on maturity of the Note, or (iii) on election of Mentor following NeuCourt’s election to prepay the Note. * | 
  | 
    $ | 
27,102 | 
  | 
  | 
    $ | 
26,454 | 
  | 
 
  
    |   | 
  | 
      | 
  | 
  | 
  | 
      | 
  | 
  | 
 
  
    | October 31, 2018, NeuCourt, Inc. convertible note receivable including accrued interest of $6,945 and $5,584 at June 30, 2021 and December 31, 2020. The note bears interest at 5% per annum and matures October 31, 2022. Principal and accrued interest are due at maturity. Principal and unpaid interest may be converted into a blend of shares of a to-be-created series of Preferred Stock and Common Stock of NeuCourt (i) on closing of a future financing round of at least $750,000, (ii) on the election of NeuCourt on the maturity of the Note, or (iii) on the election of Mentor following NeuCourt’s election to prepay the Note. * | 
  | 
      | 
56,945 | 
  | 
  | 
      | 
55,584 | 
  | 
 
  
    |   | 
  | 
      | 
  | 
  | 
  | 
      | 
  | 
  | 
 
  
    | Total convertible notes receivable | 
  | 
      | 
84,047 | 
  | 
  | 
      | 
82,038 | 
  | 
 
  
    |   | 
  | 
      | 
  | 
  | 
  | 
      | 
  | 
  | 
 
  
    | Less current portion | 
  | 
      | 
(27,102 | 
) | 
  | 
      | 
(26,454 | 
) | 
 
  
    |   | 
  | 
      | 
  | 
  | 
  | 
      | 
  | 
  | 
 
  
    | Long term portion | 
  | 
    $ | 
56,945 | 
  | 
  | 
    $ | 
55,584 | 
  | 
 
   
 |