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Note 13 - Revenue and Geographic Information (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Revenue from External Customers by Products and Services [Table Text Block]
  

Years Ended December 31,

 
  

2022

  

2021

  

2020

 
  

Revenue

  

Percentage of
Product
Revenue

  

Revenue

  

Percentage of
Product
Revenue

  

Revenue

  

Percentage of
Product
Revenue

 

OA Pain Management

 $97,887   63

%

 $89,503   61

%

 $83,029   64

%

Joint Preservation and Restoration

  50,402   32

%

  48,588   33

%

  39,368   30

%

Non-Orthopedic

  7,947   5

%

  9,703   6

%

  8,060   6

%

Total

 $156,236   100

%

 $147,794   100

%

 $130,457   100

%

Schedule of Revenue and Operating Income by Geographical Areas [Table Text Block]
  

Years Ended December 31,

 
  

2022

  

2021

  

2020

 
  

Total

  

Percentage of

  

Total

  

Percentage of

  

Total

  

Percentage of

 
  

Revenue

  

Revenue

  

Revenue

  

Revenue

  

Revenue

  

Revenue

 

Geographic Location:

                        

United States

 $119,151   76% $113,833   77

%

 $103,182   79

%

Europe

  20,639   13%  19,580   13

%

  14,179   11

%

Other

  16,446   11%  14,381   10

%

  13,096   10

%

Total

 $156,236   100% $147,794   100

%

 $130,457   100

%

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]
  

Years Ended December 31,

 
  

2022

  

2021

 

United States

 $47,068  $46,068 

Italy

  1,211   1,534 

Total

 $48,279  $47,602