Summary of Significant Accounting Policies - Narative (Details) (USD $)	6 Months Ended	12 Months Ended
Jun. 30, 2012 Tenants	Dec. 31, 2011
Valuation of real estate and related assets [Line Items]
Restricted cash	$ 337,572	$ 1,383,129
Number of tenants	3
Stock issued during period, shares, dividend reinvestment plan	38,747	13,863
Redeemable common stock, amount	368,000	132,000
Restricted cash, rents from certain encumbered properties
Valuation of real estate and related assets [Line Items]
Restricted cash	308,000	300,000
Number of tenants	1
Restricted cash, investor proceeds for which shares of common stock had not been issued
Valuation of real estate and related assets [Line Items]
Restricted cash	30,000	65,000
Lender reserve due to tenant
Valuation of real estate and related assets [Line Items]
Restricted cash		1,000,000
Number of tenants		1
Number of acquired properties		1
Lender reserve due to tenant released
Valuation of real estate and related assets [Line Items]
Restricted cash	$ 1,000,000
Building and building improvements
Valuation of real estate and related assets [Line Items]
Acquired real estate asset, useful life	40 years

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element.

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The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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