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Note 3 - Accounts Receivable, Net
 6 Months Ended
Jun. 30, 2017
Notes to Financial Statements  
Financing Receivables [Text Block]
3
. Accounts receivable
, net
 
Accounts receivable, net, consist
ed of the following as of:
 
(in thousands)
  
June 30
,
2017
    
December 31,
201
6
  
Accounts receivable
   $
19,113
     $
14,050
  
Less allowance for uncollectible accounts receivable
    
(1,097
 )    
(785
 )
Accounts receivable, net
   $
18,016
     $
13,265