Mortgages - Additional Information (Detail) (USD $)	9 Months Ended	12 Months Ended					9 Months Ended				9 Months Ended			9 Months Ended		1 Months Ended
	Sep. 30, 2012	Dec. 31, 2006	Dec. 31, 2004	Dec. 31, 1999	Dec. 31, 2011	Dec. 22, 2011	Sep. 30, 2012 First Mortgage	Jan. 05, 2007 First Mortgage	Sep. 01, 2005 First Mortgage	Dec. 29, 2004 First Mortgage	Sep. 30, 2012 Second Mortgage	Mar. 05, 2009 Second Mortgage	May 25, 2006 Second Mortgage	Sep. 30, 2012 Line of Credit	Oct. 15, 2009 Line of Credit	Jan. 31, 2012 Line of Credit Minimum
Debt Instrument [Line Items]
Current debt instrument maximum amount										$ 30,500,000			$ 12,410,000
Debt instrument outstanding	5,934,616									3,000,000			2,100,000		934,616
Remaining balance of debt instrument drawn and outstanding										27,500,000			10,310,000
Pre-existing first mortgage									15,500,000
Initial drawing of mortgage loan								3,000,000					2,100,000
Debt Instrument Interest Rate								5.33%				6.13%
Monthly payments of debt							184,213				80,947
Term of mortgage							25 years				25 years
Debt instrument outstanding							26,640,483				11,589,633
Principal amount on maturity date							24,680,713				10,936,920
Maturity date of first and second mortgage											Jan. 05, 2015
Maximum period for no prepayment penalty at the end of term							90 days				60 days
Current debt instrument maximum amount, line of credit															21,000,000
Debt instrument maximum amount on senior mortgage debt															42,910,000
Debt instrument additional balance						5,000,000
Interest rate basis point														5.00% instead of 6.75%, or (ii) 300 basis points instead of 325 basis points, above the weekly average yield on U .S. Treasury Securities adjusted to a maturity date closest to the mortgage maturity date
Previous floor rate on line of credit	6.50%
Floor rate on line of credit	4.25%
Interest rate under condition first for fixed rate calculation																4.75%
Basis points in addition to weekly average yield under second condition for fixed rate calculation	3.00%
Modified fixed interest rate for prepayment without prepayment fees	5.00%
Fair value of mortgage debt	46,733,412
Increase in Building improvement program costs	82,300,000	82,300,000	31,400,000	12,200,000
Previous debt instrument maximum amount	42,910,000
Debt instrument maximum amount	63,900,000
Actual Improvement Cost	49,587,660
Additional Borrowing available from line of credit	21,000,000
Payable to Lessee, a related party	$ 9,350,095				$ 3,576,129