Investments in Real Estate - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Detail) (USD $)						3 Months Ended			3 Months Ended						3 Months Ended						3 Months Ended						3 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 Leases, Acquired-in-Place		Mar. 31, 2014 Net Above (Below) Market Lease Intangibles		Mar. 31, 2014 Rosecrans Avenue		Jan. 15, 2014 Rosecrans Avenue	Mar. 31, 2014 Oxnard Street	Jan. 22, 2014 Oxnard Street	Mar. 31, 2014 Oxnard Street Leases, Acquired-in-Place		Mar. 31, 2014 Oxnard Street Net Above (Below) Market Lease Intangibles		Mar. 31, 2014 Milliken Avenue	Feb. 12, 2014 Milliken Avenue	Mar. 31, 2014 Milliken Avenue Leases, Acquired-in-Place		Mar. 31, 2014 Milliken Avenue Net Above (Below) Market Lease Intangibles		Mar. 31, 2014 West 228th Street	Feb. 25, 2014 West 228th Street	Mar. 31, 2014 West 228th Street Leases, Acquired-in-Place		Mar. 31, 2014 West 228th Street Net Above (Below) Market Lease Intangibles		Mar. 31, 2014 Frampton Avenue	Mar. 20, 2014 Frampton Avenue	Mar. 31, 2014 Frampton Avenue Leases, Acquired-in-Place
Business Acquisition [Line Items]
Acquisition Date						Jan. 15, 2014	[1]		Jan. 22, 2014						Feb. 12, 2014						Feb. 25, 2014						Mar. 20, 2014
Acquired Land	$ 14,854,000					$ 3,117,000	[1]		$ 4,373,000						$ 2,440,000						$ 2,609,000						$ 2,315,000
Buildings and Improvements	16,787,000					1,894,000	[1]		3,873,000						5,588,000						3,879,000						1,553,000
Lease Intangibles		1,747,000	[2]	(422,000)	[3]						650,000	[2]	(21,000)	[3]			616,000	[2]	(94,000)	[3]			419,000	[2]	(307,000)	[3]			62,000	[2]
Total Purchase Price	32,966,000					5,011,000	[1]	4,969,000	8,875,000	8,875,000					8,550,000	8,550,000					6,600,000	6,600,000					3,930,000	3,930,000
Other Assets	24,000														2,000												22,000
Notes Payable, Accounts Payable, Accrued Expenses and Tenant Security Deposits	(651,000)					(321,000)	[1]		(117,000)						(116,000)						(33,000)						(64,000)
Net Assets Acquired	$ 32,339,000					$ 4,690,000	[1]		$ 8,758,000						$ 8,436,000						$ 6,567,000						$ 3,888,000

[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.

[2] The weighted average amortization period of acquired in-place lease intangibles for our 2014 acquisitions was 1.9 years as of March 31, 2014.

[3] The weighted average amortization period of net below market leases for our 2014 acquisitions was 2.6 years as of March 31, 2014.