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7. Long-Term Debt (Details) (USD $)
Jun. 30, 2013
Dec. 31, 2012
Total debt $ 1,357,768 $ 1,505,494
Less current portion (378,033) (461,354)
Noncurrent portion 979,735 1,044,140
ThermFisherFinancialServices [Member]
   
Total debt 13,813 34,310
ThermFisherFinancialServices1 [Member]
   
Total debt 22,333 30,708
StearnsBank [Member]
   
Total debt 60,638 79,500
WesternStatesEquipmentCo [Member]
   
Total debt 45,791 56,390
CNH Capital America LLC [Member]
   
Total debt    3,478
Catepillar Finance [Member]
   
Total debt 20,845 25,823
GE Capital [Member]
   
Total debt 715 2,847
De Lage Landen Financial Services [Member]
   
Total debt 16,825 19,629
PhyllisRice [Member]
   
Total debt 43,364 55,365
De Lage Landen Financial Services 1 [Member]
   
Total debt 12,695 16,496
CatepillarFinance1 [Member]
   
Total debt 10,295 14,535
De Lage Landen Financial Services 2 [Member]
   
Total debt 8,264 12,235
Corral Blancoland [Member]
   
Total debt    86,747
SoyatalMine [Member]
   
Total debt $ 1,102,190 $ 1,067,431