Mortgages Payable - Additional Information (Detail) (USD $)	1 Months Ended	6 Months Ended	12 Months Ended					6 Months Ended		1 Months Ended		6 Months Ended	1 Months Ended		6 Months Ended
	Jun. 18, 2013	Jun. 30, 2013	Dec. 31, 2004	Dec. 31, 2000	Dec. 31, 1999	May 23, 2013	Dec. 31, 2012	Jun. 30, 2013 Debt Instrument Interest Rate Fixing Option One [Member]	Jun. 30, 2013 Debt Instrument Interest Rate Fixing Option Two [Member]	Jul. 05, 2007 First Mortgage [Member]	Nov. 29, 2004 First Mortgage [Member]	Jun. 30, 2013 First Mortgage [Member]	Nov. 29, 2004 Pre Existing First Mortgage [Member]	Nov. 29, 2004 Pre Existing Second Mortgage [Member]	Jun. 30, 2013 Second Mortgage [Member]	Nov. 05, 2009 Second Mortgage [Member]
Debt Instrument [Line Items]
Debt instrument amount		$ 100,000,000									$ 84,000,000					$ 16,000,000
Repayments of debt										35,000,000	49,000,000		12,020,814	27,979,186
Debt instrument, interest rate										5.34%					7.00%
Loan, monthly payments												507,838			113,085
Loan, amortization schedule												25 years			25 years
Loan, balance amount												72,837,163			15,037,852
Principal amount on maturity date												69,600,350			14,585,904
Debt maturity date												Nov. 05, 2014			Nov. 05, 2014
Maximum period for no prepayment penalty at the end of term		60 days
Closed loan amount with Signature Bank						12,000,000
Amount drawn for closing costs						382,397
Additional loan amount	4,000,000	4,382,397
Debt maturity date		Nov. 05, 2014
Interest rate terms		The loan requires payments of interest only at the greater of (i) 3.75% or (ii) 1/2% plus the lender's prime rate.						If the Registrant elects Option A, the loan may be prepaid in whole or in part (in multiples of $100,000) at any time upon not less than thirty days' notice subject to a prepayment fee equal to (i) 1% multiplied by (ii) the number of years or partial years remaining in the term of the loan, multiplied by (iii) the amount of such prepayment. There is no prepayment fee if paid during the 60 day period preceding the maturity date.
Interest rate		3.75%							4.00%
Interest rate, Minimum		0.50%
Minimum increments		3,000,000
Number of basis points								2.75%	3.00%
Minimum amount of multiple used for prepayment								100,000
Minimum notice period								30 days
Prepayment fee percentage								1.00%
Loan prepaid period without prepayment fee		60 days
Fair value of mortgage debt		96,053,326
Mortgage financing costs		3,267,719
Estimated cost of building improvements program					22,800,000
Increase in estimated cost of building improvements program				28,000,000
Further increase in estimated cost of building improvement			100,000,000
Cost incurred by Registrant related to building improvements program		83,134,430
Estimated cost of initial building improvements program on completion		100,000,000
Payable to Lessee, a related party		$ 2,215,574					$ 21,951