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Note 3 - Receivables
12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
(3)
Receivables
 
Receivables consist of the following (in thousands):
 
    December 31,
    2016   2015
Accounts receivable–trade   $
21,816
    $
17,980
 
Less allowance for doubtful receivables    
(567
)    
(499
)
Receivables, net   $
21,249
    $
17,481
 
 
Receivables are written off against these reserves in the period they are determined to be uncollectible, and payments subsequently received on previously written-off receivables are recorded as a reversal of the bad debt provision. The Company performs credit evaluations on its customers and obtains credit insurance on a large percentage of its accounts, but does not generally require collateral. The Company recorded a provision for doubtful accounts of approximately
$126,000
and
$16,000
for the years ended
December
 
31,
2016
and
2015,
respectively.