Related Party Transactions (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Total related-party amounts payable	$ 1,022,406	$ 1,791,440
Asset Management [Member]
Total related-party amounts payable	351,134	562,732
Acquisitions Fees [Member]
Total related-party amounts payable	0	81,776
Financing Fees [Member]
Total related-party amounts payable	0	14,491
Reimbursable Operating Expenses [Member]
Total related-party amounts payable	394,899	900,512
Reimbursable Offering Costs [Member]
Total related-party amounts payable	207,180	171,099
Reimbursable Organizational Costs [Member]
Total related-party amounts payable	49,931	49,931
Others [Member]
Total related-party amounts payable	$ 19,262	$ 10,899