| Schedule of intangible assets | 
    |  |  | Original
    Fair Market Value |  |  | Accumulated
    Amortization |  |  | Net |  |  | Useful
    Life (Years) |  |  
    | Balance - June 30, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
    | In-process research and development |  | $ | 3,730,000 |  |  | $ | – |  |  | $ | 3,730,000 |  |  |  |  |  |  
    | Trade names |  |  | 100,000 |  |  |  | 30,000 |  |  |  | 70,000 |  |  |  | 5 |  |  
    | Non-compete agreements |  |  | 77,000 |  |  |  | 23,100 |  |  |  | 53,900 |  |  |  | 5 |  |  
    |  |  | $ | 3,907,000 |  |  | $ | 53,100 |  |  | $ | 3,853,900 |  |  |  |  |  |  
    |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
    | Balance - December 31, 2016: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
    | In-process research and development |  | $ | 3,730,000 |  |  | $ | – |  |  | $ | 3,730,000 |  |  |  |  |  |  
    | Trade names |  |  | 100,000 |  |  |  | 20,000 |  |  |  | 80,000 |  |  |  | 5 |  |  
    | Non-compete agreements |  |  | 77,000 |  |  |  | 15,400 |  |  |  | 61,600 |  |  |  | 5 |  |  
    |  |  | $ | 3,907,000 |  |  | $ | 35,400 |  |  | $ | 3,871,600 |  |  |  |  |  |  |