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6. Properties, Plants and Equipment (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Equipment $ 8,743,951 $ 6,626,094
Buildings 1,380,049 1,362,555
Mineral Rights 916,522 786,088
Land & Other 6,393,315 5,083,692
Total 17,433,837 13,858,429
Accumulated Depreciation (5,038,192) (4,349,454)
Properties, plants and equipment, net 12,395,645 9,508,975
USAC
    
Equipment 749,493 668,811
Buildings 242,186 241,297
Mineral Rights 0 0
Land & Other 3,270,248 3,251,660
Total 4,261,927 4,161,768
Accumulated Depreciation (2,333,484) (2,271,910)
Properties, plants and equipment, net 1,928,443 1,889,858
MEXICO
    
Equipment 4,952,524 3,086,510
Buildings 787,917 776,374
Mineral Rights 916,522 786,088
Land & Other 3,123,067 1,832,032
Total 9,780,030 6,481,004
Accumulated Depreciation (987,621) (578,812)
Properties, plants and equipment, net 8,792,409 5,902,192
BRZ
    
Equipment 3,041,934 2,870,773
Buildings 349,946 344,884
Mineral Rights 0 0
Land & Other 0 0
Total 3,391,880 3,215,657
Accumulated Depreciation (1,717,087) (1,498,732)
Properties, plants and equipment, net $ 1,674,793 $ 1,716,925