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Note 9 - Net Income (Loss) Per Share Attributable to Common Shareholders (Tables)
3 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
  

Three Months Ended December 31,

 

(in thousands, except per share data)

 

2022

  

2021

 

Numerator:

        

Net income (loss) - basic earnings per share

 $(80

)

 $1,872 

Effect on dilutive securities:

        

Change in fair value of in-the-money warrant derivative liabilities

  (2)  (1,247

)

Net income (loss) applicable to common shareholders – diluted earnings per share

 $(82

)

 $625 
         

Denominator:

        

Weighted-average shares outstanding for basic earnings per share

  10,417,609   10,189,012 

Effect on dilutive securities:

        

Options

  -   242,699 

Warrants

  13,213   155,017 

Preferred Stock

  -   38,889 

Weighted-average shares outstanding for diluted earnings per share

  10,430,822   10,625,617 
         

Basic net income (loss) per share

 $(0.01) $0.18 

Diluted net income (loss) per share

 $(0.01) $0.06 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

As of December 31,

 
  

2022

  

2021

 

Stock options

  1,192,094   244,348 

Warrants

  1,744,416   976,520 

Convertible preferred stock

  38,889   -