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Note 8 - Revenue (Tables)
3 Months Ended
Mar. 31, 2023
Notes Tables  
Disaggregation of Revenue [Table Text Block]
  

Three Months Ended

 
  

March 31,

 
  

2023

  

2022

 

Testing

 $4,938  $5,724 

Shipping/Collection (hair)

  898   750 

Other

  23   34 

Total Revenue

 $5,859  $6,508