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Note 10 - Income Taxes (Tables)
3 Months Ended
Mar. 31, 2024
Notes Tables  
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]
   

Three Months Ended March 31,

 

(in thousands)

 

2024

   

2023

 

United States

  $ (11,039 )   $ (11,546 )

Foreign

    (41 )     (224 )

Net loss before income taxes

  $ (11,080 )   $ (11,770 )