Commitments and Contingencies - Other Matters - Additional Information (Detail)	3 Months Ended		6 Months Ended	12 Months Ended
	Mar. 31, 2016 USD ($) ft² a	Dec. 31, 2015 USD ($) a	Mar. 31, 2016 USD ($) ft² a	Dec. 31, 2015 USD ($) a	Feb. 18, 2016 a
Loss Contingencies [Line Items]
Area of real estate property	1,700,000	160	1,700,000	160	0.37
Costs affiliated with wetlands mitigation permits				$ 187,500
Other third party cost	$ 927,000		$ 988,000
Definitive Sales Contracts [Member]
Loss Contingencies [Line Items]
Area of real estate property | a		160		160
Adjustment to land and development accrual	0
Estimated cost of construction, current year		$ 1,700,000		$ 1,700,000
Cost of infrastructure improvements	0
Costs affiliated with wetlands mitigation permits	$ 0
Mitigation Activities [Member] | Definitive Sales Contracts [Member]
Loss Contingencies [Line Items]
Area of real estate property | a	60		60
Minimum [Member] | Definitive Sales Contracts [Member]
Loss Contingencies [Line Items]
Cost of the contract		1,700,000		1,700,000
Maximum [Member] | Definitive Sales Contracts [Member]
Loss Contingencies [Line Items]
Cost of the contract		1,900,000		$ 1,900,000
Environmental Restoration Costs [Member]
Loss Contingencies [Line Items]
Accrued Penalties	$ 0	$ 187,500