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Note 3 - Balance Sheet Components (Tables)
6 Months Ended
Jun. 30, 2022
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
  

June 30,

2022

  

December 31,

2021

 

Prepaid clinical trial expenses

 $1,020,352  $- 

Prepaid insurance premiums

  42,383   123,248 

Prepaid rent

  13,045   13,045 

Other prepaid expenses

  60,000   19,947 

Total prepaid expenses

 $1,135,780  $156,240 
Property, Plant and Equipment [Table Text Block]
  

June 30,

2022

  

December 31,

2021

 

Equipment and furnishings

 $673,937  $591,554 

Leasehold improvements

  115,605   115,605 

Total property and equipment

  789,542   707,159 

Accumulated depreciation and amortization

  (574,759)  (550,221)

Total property and equipment, net

 $214,783  $156,938 
Schedule of Other Assets [Table Text Block]
  

June 30,

2022

  

December 31,

2021

 

Prepaid clinical trial expenses

 $976,498  $- 

Lease deposit

  11,010   11,010 

Total other assets

 $987,508  $11,010 
Schedule of Accrued Liabilities [Table Text Block]
  

June 30,

2022

  

December 31,

2021

 

Accrued technology license fees – current portion

 $3,000,000  $3,000,000 

Accrued compensation

  4,583   269,000 

Other accrued expenses

  125,970   108,826 

Total accrued expenses

 $3,130,553  $3,377,826