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Capital Lease Obligations (Details 2) (USD $)
Mar. 31, 2013
Dec. 31, 2012
Total minimum lease payments    
- Within one year $ 99,512 $ 103,890
- After one year but within 5 years 121,447 143,430
Capital Leases, Future Minimum Payments Receivable 220,959 247,320
Interest expenses relating to future periods (15,006) (17,386)
Capital Lease Obligations $ 205,953 $ 229,934