Quarterly report pursuant to sections 13 or 15(d)

6. Accounts Payable and Accrued Expenses (Details)

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6. Accounts Payable and Accrued Expenses (Details) (USD $)
Jun. 30, 2012
Dec. 31, 2011
Notes to Financial Statements    
Trade accounts payable $ 7,536,975 $ 8,061,024
Accrued expenses 471,899 468,214
Accrued payroll and vacation 95,425 110,829
Cost accrual 203,039 2,815
Interest payable 463,842 376,506
Deferred revenue 19,357 10,044
Other 373,494 419,549
Total notes payable $ 9,164,031 $ 9,448,981