Summary of Significant Accounting Policies (Schedule of Real Estate Properties) (Details) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013
Real Estate Properties [Line Items]
Net Book Value	$ 12,884,083			$ 12,884,083			$ 15,526,089
Impairment loss	2,304,414		0	2,304,414		0
Nathan Lane Building
Real Estate Properties [Line Items]
Net Book Value	16,017,217	[1]		16,017,217	[1]
Impairment loss	2,304,414			2,304,414
Nathan Lane Building | Fair Value, Inputs, Level 3
Real Estate Properties [Line Items]
Fair Value	$ 13,712,803			$ 13,712,803

[1] Net book value includes the straight-line rent receivable as of June 30, 2014, which is included in tenant receivables in the accompanying balance sheets.