Investments in Real Estate - Acquisitions - Additional Information (Detail) (USD $)		1 Months Ended			1 Months Ended		1 Months Ended		1 Months Ended		1 Months Ended
	Mar. 31, 2014	Jan. 15, 2014 Rosecrans Avenue Buildings sqft acre	Mar. 31, 2014 Rosecrans Avenue		Jan. 22, 2014 Oxnard Street Buildings acre sqft	Mar. 31, 2014 Oxnard Street	Feb. 12, 2014 Milliken Avenue Buildings acre sqft	Mar. 31, 2014 Milliken Avenue	Feb. 25, 2014 West 228th Street Buildings acre sqft	Mar. 31, 2014 West 228th Street	Mar. 20, 2014 Frampton Avenue Buildings acre sqft	Mar. 31, 2014 Frampton Avenue
Disclosure Investment In Real Estate Acquisitions Additional Information Detail [Line Items]
Total Purchase Price	$ 32,966,000	$ 4,969,000	$ 5,011,000	[1]	$ 8,875,000	$ 8,875,000	$ 8,550,000	$ 8,550,000	$ 6,600,000	$ 6,600,000	$ 3,930,000	$ 3,930,000
Number of buildings acquired		1			6		5		6		1
Square footage of buildings acquired		72,000			78,000		113,612		88,330		47,903
Acres of land		3.25			3.25		5.74		3.9		2.07

[1] As the purchase of 7110 Rosecrans Avenue was accounted for as an asset acquisition, the total purchase price allocation of includes $42,000 of capitalized acquisition costs.