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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2012
Accounting Policies [Abstract]  
Estimated Useful Life

Property and equipment owned and under capital leases are carried at cost. Depreciation of property and equipment is provided using the straight line method for financial reporting purposes at rates based on the following estimated useful lives:

 

    Years  
Machinery and equipment      3-7  
Track on leased properties     4