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Note 2 - Prepaid Expenses and Other Current Assets (Tables)
9 Months Ended
Sep. 30, 2020
Notes Tables  
Schedule of Prepaid Expense and Other Current Assets [Table Text Block]
   

September 30,

   

December 31,

 
   

2020

   

2019

 

Prepaid subscriptions

  $ 139     $ 161  

Prepaid insurance

    316       292  

Prepaid marketing and sponsorships

    60       25  

Other

    285       381  

Total prepaid expenses and other current assets

  $ 800     $ 859