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Note 10 - Revenue
 12 Months Ended
Dec. 31, 2018
Notes to Financial Statements  
Revenue from Contract with Customer [Text Block]
10.
Revenue
 
The following table disaggregates revenue by market segment and distributors: 
 
   
Year Ended
December 31,
  
(In thousands)
 
2018
    
2017
  
Regenerative Medicine
   $
11,029
     $
5,307
  
Distributors
    
6,418
      
3,232
  
Drug discovery
    
1,199
      
1,318
  
BioBanking
    
1,096
      
1,165
  
Total
   $
19,742
     $
11,022