Credit Facilities - Summary of Notes Payable (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Debt instrument, gross	$ 43,704
Net secured notes	26,927	$ 24,692
Unsecured financing, net of unamortized deferred financing charges of $121 and $187	911	1,361
Notes payable to affiliates, unsecured, net of $ 2.1 million and $ 2.3 million discount and unamortized deferred financing charges	15,866	19,028
Total notes payable	43,704	45,081
Construction Loans [Member] \| Construction Revolvers [Member]
Debt Instrument [Line Items]
Debt instrument, gross	6,429	5,832
Development and Acquisition Notes [Member]
Debt Instrument [Line Items]
Debt instrument, gross	16,278	13,833
Net secured notes	16,278	13,833
Mezzanine Notes [Member]
Debt Instrument [Line Items]
Debt instrument, gross	1,424	1,367
Line of Credit [Member]
Debt Instrument [Line Items]
Debt instrument, gross	2,929	3,791
Secured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, gross	27,060	24,823
Deferred financing charges, net of amortization	$ (133)	$ (131)

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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