Stockholders' Equity (Narrative) (Details)			1 Months Ended	12 Months Ended
	Oct. 19, 2015 USD ($) shares	Aug. 27, 2015 USD ($) shares	Oct. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) a property shares	Dec. 31, 2014 USD ($) shares	Dec. 31, 2013 USD ($) shares	Aug. 26, 2015 shares
Class of Stock [Line Items]
Common stock special dividend paid per share (in common shares per share of preferred stock)		127
Payment of dividends (in shares)				6,172,020
Payment of dividends | $		$ 3,271,000		$ 0	$ 0	$ 0
Gross proceeds from the issuance of common stock | $	$ 6,000,000		$ 6,000,000
Proceeds from the issuance of common stock, net of issuance costs | $			$ 5,900,000
Shares issued	10,169,492		10,169,492
Common stock issued price, per share (in dollars per share) | $ / shares			$ 0.59
Purchase of building | $				$ 1,024,790	$ 1,014,957
Purchase agreement, number of properties | property				3
Common Stock
Class of Stock [Line Items]
Payment of dividends (in shares)				11,842,085	2,254,599	2,167,398
Payment of dividends | $				$ (7,887)	$ (1,502)	$ (1,443)
Vested restricted stock, (in shares)				60,000	1,777,000	1,199,300
Stock issued during period for purchase of assets (in shares)				1,726,312	728,578
Purchase of building | $				$ 1,150	$ 485
Series A-1 Convertible Preferred Stock
Class of Stock [Line Items]
Convertible preferred stock, shares issued upon conversion (in shares)							53,600,000
Conversion of preferred stock to common stock (in shares)				24,362	0
Series A-1 Convertible Preferred Stock | Common Stock
Class of Stock [Line Items]
Common stock shares issued as a result of conversion of Preferred stock				37,422,416	0
Series A-2 Convertible Preferred Stock
Class of Stock [Line Items]
Conversion of preferred stock to common stock (in shares)				1,610	0
Series A-2 Convertible Preferred Stock | Common Stock
Class of Stock [Line Items]
Common stock shares issued as a result of conversion of Preferred stock				2,473,597	0
Common Stock
Class of Stock [Line Items]
Payment of dividends (in shares)				5,670,065	2,254,599	2,167,398
Payment of dividend | $				$ 3,900,000	$ 3,900,000	$ 4,200,000
7.5% Series B Convertible Preferred Stock
Class of Stock [Line Items]
Conversion of preferred stock to common stock (in shares)				22,676
7.5% Series B Convertible Preferred Stock | Common Stock
Class of Stock [Line Items]
Conversion of preferred stock to common stock (in shares)				1,517
Conversion of convertible preferred stock into common stock (in shares)				13,743,209	919,381	2,548,908
Common stock shares issued as a result of conversion of Preferred stock				919,381
Termination of Agreement to Purchase Building
Class of Stock [Line Items]
Payments to acquire buildings | $				$ 34,000
Commercial Residential Building and Lot
Class of Stock [Line Items]
Stock issued during period for purchase of assets (in shares)				1,726,312
Fair value of common stock issued for purchase of land | $				$ 1,024,790
2011 Equity Incentive Plan
Class of Stock [Line Items]
Vested restricted stock, (in shares)				60,000	1,777,000
Land
Class of Stock [Line Items]
Area of land purchased (in acres) | a				212
Payments to acquire land | $				$ 1,500,000
Restricted stock | Termination of Agreement to Purchase Building | Common Stock
Class of Stock [Line Items]
Restricted shares of common stock canceled (in shares)				235,151
Purchase of building | $				$ 388,000
Restricted stock | Purchase Agreement for Acquisition of Properties
Class of Stock [Line Items]
Stock issued during period for purchase of assets (in shares)				1,203,645
Restricted stock | Land | Common Stock
Class of Stock [Line Items]
Stock issued during period for purchase of assets (in shares)				650,000
Restricted shares of common stock canceled (in shares)				650,000