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Note 15 - Income Taxes (Tables)
12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
  

Year Ended December 31,

 
  

2021

  

2020

 

Current tax benefit

 $-  $- 

Deferred tax benefit

  6,409   3,158 

Change in valuation allowance

  (6,409)  (3,158)

Income tax benefit (provision)

 $-  $- 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
  

Year Ended December 31,

 
  

2021

  

2020

 

Income taxes benefit computed at federal statutory rate

 $5,139  $2,642 

State income taxes, net of federal effect

  480   216 

Permanent differences and other

  790   300 

Change in valuation allowance

  (6,409)  (3,158)

Income tax benefit (provision)

 $-  $- 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
  

December 31,

 
  

2021

  

2020

 

Deferred tax assets:

        

Net operating losses

 $11,773  $5,444 

Research tax credits

  60   45 

Stock compensation

  847   542 

Accruals and other

  211   169 
   12,891   6,200 

Deferred tax liabilities:

        

Depreciation and other

  678   396 
   678   396 

Net deferred tax assets

  12,213   5,804 

Less valuation allowance

  (12,213)  (5,804)

Net deferred taxes after valuation allowance

 $-  $-