Note 5 - Accounts Receivable, Net
 12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Note
5
–
Accounts Receivable, net
 
Accounts receivable, net consists of the following:
 
 
 
December 31,
 
 
December 31,
 
 
 
2016
 
 
2015
 
                 
Billed
  $
53,756
    $
32,806
 
Unbilled
   
23,237
     
15,678
 
Contract retentions
   
510
     
799
 
                 
     
77,503
     
49,283
 
Less: allowance for doubtful accounts
   
(1,992
 )    
(1,536
 )
Accounts receivable, net
  $
75,511
    $
47,747
 
 
Billed accounts receivable represent amounts billed to clients that remain uncollected as of the balance sheet date. Unbilled accounts receivable represent recognized revenues pending billing pursuant to contract terms or accounts billed after period end, and are expected to be billed and collected within the next
12
months.
 
Activity in the allowance for doubtful accounts consisted of the following:
 
 
 
December 31,
 
 
December 31,
 
 
 
2016
 
 
2015
 
                 
Balance as of the beginning of the year
   $
1,536
    $
845
 
Provision for doubtful accounts
    
138
     
164
 
Write-offs of uncollectible accounts
    
(60
 )    
(269
 )
Other
(1)
    
378
     
796
 
Balance as of the end of the year
   $
1,992
    $
1,536
 
 
(1)
Includes allowances from new business acquisitions.