Note 3 - Inventories, Net (Tables)
 12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
  

As of December 31,

 
  

2021

  

2020

 

Raw materials

 $722  $257 

Work-in-process

  159   30 

Finished goods

  230   1,339 

Inventories

 $1,111  $1,626