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Note 5 - Accounts Receivable, Net
 12 Months Ended
Dec. 31, 2019
Notes to Financial Statements  
Financing Receivables [Text Block]
5.
Accounts receivable, net
 
Accounts receivable, net, consisted of the following as of:
 
   
December 31,
  
(in thousands)
  
2019
    
2018
  
Accounts receivable
   $
13,785
     $
9,246
  
Less allowance for uncollectible accounts receivable
    
(116
 )    
(88
 )
Accounts receivable, net
   $
13,669
     $
9,158
  
 
Included in the accounts receivable balance as of
December 31, 2019
is
$1.6
million related to an arrangement with
one
of our customers for which we have satisfied our performance obligation, however we have
not
yet billed the customer as of the balance sheet date.
 
Activity for the allowance for uncollectible accounts receivable is as follows:
 
   
December 31,
  
(in thousands)
  
2019
    
2018
  
Balance at beginning of period
   $
(88
 )   $
—
  
Provision for bad debt expense
    
(36
 )    
(88
 )
Write-off
    
8
      
—
  
Balance at end of period
   $
(116
 )   $
(88
 )