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ACCOUNTS RECEIVABLE
12 Months Ended
Dec. 31, 2013
ACCOUNTS RECEIVABLE [Abstract]  
ACCOUNTS RECEIVABLE
3.    ACCOUNTS RECEIVABLE

Accounts receivable consists of trade receivables as follows:

 
2013
2012
     
Billed receivables
$4,417,254
$8,312,250
Less: allowance for doubtful accounts
(25,000)
(25,000)
 
$4,392,254
$8,287,250
 
At December 31, 2013, there were no amounts classified as non-current other assets. At December 31, 2012 approximately $1.5 million was classified as non-current other assets.