Fair Value Measurements (Details 1) (Level 3 inputs, USD $)	6 Months Ended
	Jun. 30, 2013
Loan Payable
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Beginning balance
Issuance of additional notes	5,860,085
Ending balance	5,876,260
Convertible Promissory Note
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Beginning balance
Issuance of additional notes	1,500,000
Ending balance	1,550,000
Equipment Notes Receivable
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Beginning balance	3,306,391
Issuance of additional notes	4,928,418
Ending balance	8,308,035
Interest income | Loan Payable
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Total gains (losses) included in earnings
Interest income | Convertible Promissory Note
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Total gains (losses) included in earnings	50,000
Interest income | Equipment Notes Receivable
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Total gains (losses) included in earnings	278,008
Interest expense | Loan Payable
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Total gains (losses) included in earnings	16,175
Interest expense | Convertible Promissory Note
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Total gains (losses) included in earnings
Interest expense | Equipment Notes Receivable
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Total gains (losses) included in earnings
Foreign currency transaction (loss) gain | Loan Payable
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Total gains (losses) included in earnings
Foreign currency transaction (loss) gain | Convertible Promissory Note
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Total gains (losses) included in earnings
Foreign currency transaction (loss) gain | Equipment Notes Receivable
Assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3)
Total gains (losses) included in earnings	$ (204,782)