Debt Financing (Details) (TEB Facility [Member], USD $)	Dec. 31, 2013		Dec. 31, 2012
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	$ 122,536,536		$ 123,630,203
Ashley Square [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	5,212,000		5,260,000
Bella Vista [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	6,545,000		6,600,000
Bent Tree [Member] | Consolidated VIEs [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	7,542,000		7,614,000
Bridle Ridge [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	7,715,000		7,765,000
Brookstone [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	9,338,603		9,416,794
Cross Creek [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	8,497,933		8,568,409
Fairmont Oaks [Member] | Consolidated VIEs [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	7,355,000		7,439,000
Lake Forest [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	8,997,000
Lake Forest [Member] | Consolidated VIEs [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value			9,105,000
Runnymede [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	10,525,000		10,605,000
Southpark [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	13,795,000		13,900,000
Woodlynn Village [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	4,426,000		4,460,000
Ohio Properties [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	14,498,000	[1]	14,582,000	[1]
Lost Creek [Member] | Available-for-sale Securities [Member]
Debt Instrument [Line Items]
Available for Sale Securities at Par Value	$ 18,090,000		$ 18,315,000

[1] Collateralized by Crescent Village, Post Woods and Willow Bend which are eliminated upon consolidation (Note 3)