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Securities (Details)	3 Months Ended			6 Months Ended
	Jun. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($) item	Jun. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Available-for-sale securities
Carrying Value / Estimated Fair Value	$ 823,050			$ 823,050		$ 2,499,709
Principal paydowns of loan sold				(551,201,085)	$ (474,807,344)
Proceeds from sale of securities					33,904,172
Reverse of unrealized loss from accumulated other comprehensive loss	364,552	$ 29,394		423,341	(29,395)
Gain on sale of securities					518,640
Residential mortgage-backed security (RMBS)
Available-for-sale securities
Number of investments acquired with deteriorated credit quality | item			2
Aggregate carrying value of investment with deteriorated credit quality			$ 25,800,000
Proceeds from sale of securities			25,900,000
Available-for-sale Securities
Available-for-sale securities
Face Value						2,100,000
Amortized Cost						2,158,789
Cumulative Unrealized Gain						340,920
Carrying Value / Estimated Fair Value						2,499,709
Impairment charges	0	$ 0		0	$ 0
Available-for-sale Securities | Realty Finance Corporation
Available-for-sale securities
Carrying Value / Estimated Fair Value	$ 800,000			$ 800,000		500,000
Number of shares of common stock purchased | shares	2,939,465			2,939,465
Available-for-sale Securities | Commercial mortgage-backed security (CMBS)
Available-for-sale securities
Face Value						2,100,000
Amortized Cost						2,100,000
Cumulative Unrealized (Loss)						(100,000)
Carrying Value / Estimated Fair Value	$ 2,000,000			$ 2,000,000		2,000,000
Proceeds from sale of securities	2,100,000
Reverse of unrealized loss from accumulated other comprehensive loss	$ 100,000
Weighted average yield (as a percent)	1.19%			1.04%
Available-for-sale Securities | Residential mortgage-backed security (RMBS)
Available-for-sale securities
Cumulative Unrealized Gain			400,000
Carrying Value / Estimated Fair Value			33,400,000
Proceeds from sale of securities			33,900,000
Gain on sale of securities			$ 500,000
Number of securities | item			2
Investments financed with a repurchase agreement with a financial institution			$ 25,300,000
Weighted average yield (as a percent)		1.15%			2.05%
Available-for-sale Securities | Common Stock
Available-for-sale securities
Amortized Cost	$ 58,789			$ 58,789		58,789
Cumulative Unrealized Gain	764,261			764,261		440,920
Carrying Value / Estimated Fair Value	$ 823,050			$ 823,050		$ 499,709

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