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Note 7 - Notes Payable (Tables)
3 Months Ended
Mar. 31, 2021
Notes Tables  
Schedule of Debt [Table Text Block]
   

March 31, 2021

   

December 31, 2020

 
                 

Notes payable, current portion

               

Paycheck Protection Program

  $ 31     $ 29  

Total notes payable, current portion

  $ 31     $ 29  
                 

Notes payable, non-current portion

               

Paycheck Protection Program

  $ 170     $ 303  

Total notes payable, non-current portion

  $ 170     $ 303