Quarterly report pursuant to sections 13 or 15(d)

6. Accounts Payable and Accrued Expenses (Tables)

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6. Accounts Payable and Accrued Expenses (Tables)
9 Months Ended
Sep. 30, 2013
Notes to Financial Statements  
Accounts payable and accrued expenses

Accounts payable and accrued expenses consist of the following at September 30, 2013 and December 31, 2012:

 

    September 30, 2013        
    (unaudited)     December 31, 2012  
Trade accounts payable   $ 5,739,625     $ 8,800,525  
Accrued expenses     594,024       993,618  
Accrued payroll and vacation     79,688       113,860  
Interest payable     355,244       93,458  
Deferred revenue     13,536       21,947  
Other     856,309       556,088  
Total accounts payable and accrued expenses   $ 7,638,426     $ 10,579,496